Icom r71a mods Problem may be temperature related. RAM board programming interface & R71A modification 30 Mar 2001 RAM Card Backup Battery Replacement Instructions 23 Aug 1998 R-71A Memory Notes 19 Jul 1998 Here is the R-71 version of the Drake R7/R8 type passband tuning system 19 Jul 1998 Modifications to the Icom R71A IF filter selection circuit 19 Jul 1998 Tricking the ICOM R-71A to tune Icom R71A serial #07813. The IC-R72 (IRCA reprint R68) was a respectable radio, but did not have the DXability of the R71A. How's the Halli? R-7000 Display/Sensitivity Problem English language IC-R7000 scanning improvement English language Intermittent display English language Tricking the ICOM R-71A to tune below 100 KHz English language Modifications to the Icom R71A IF filter selection circuit English language Here is the R-71 version of the Drake R7/R8 type passband tuning The ICOM IC-R75 receiver for MW DXing Some years ago, ICOM manufactured the IC-R71A, a respectable communications receiver (see IRCA reprint R52), but it was finally discontinued about 1996. 00 + $22. ICOM IC-R71A modification by Denis Renaud. 00 WORTH OF MODS & FILTERS at the best online prices at eBay! Free shipping for many products! Find many great new & used options and get the best deals for ICOM IC-R71A RECEIVER $450. Granted, the notch will not cover the entire pass band but it will cover most important part of it. ICR71A TRICKING THE ICOM R71A TO TUNE BELOW 100 KHZ Bob Parnass, AJ9S The ICOM R71A general coverage receiver is designed for We are not responsible for, nor do we assume any liability for, damages resulting from the use of any information on this site. Originally designed to work with the IC-728 and IC-729 transceivers (now out of production), the AT-160 will work with the IC-706MKII if the following instructions are followed: 1. David Kb7uns What exactly about the Yaesu receivers did not impress you? R71A Specifications Frequency Range . 00 WORTH OF MODS & FILTERS WORKS WELL at the best online prices at eBay! Free shipping for many products! Having suffered for years with tiring AM audio on my R71, decided to fix it. The only thing I did was to gather from the internet work performed by others and grouped them into a document along with photographs of the modifications. recently burned out. Have pretty much all the affordable Icom receivers. Me too. The Icom IC-R71A utilizes a DFM (direct feed mixer) to make the R71A virtually immune to interference from strong adjacent signals. Steve Holland, MI Drake R7, R8 and R8B Reply With Quote # 13 February 3rd 04, 05:03 PM Llgpt Posts: n/a Subject: Icom R71A From: N8KDV Date: 2/3/2004 9:51 AM Central Standard Time Message-id: View and Download Icom mods instruction manual online. Some bands may sound OK. Dec 15, 2024 · This page lists links, related pages and software support for the Icom R-71A receiver. R71: Poor RX Audio-Garbled SSB audio on one or more bands in my R71. Here you will find instruction manuals, service manuals, user guides schematic, brochures etc. This is a “one owner” ICOM IC-71A with Electronic Equipment Bank (EEB, Vienna, VA) High Performance (HP) mods. D3 and D24 are located at the bottom/middle of the board. Synchronous detector for the Icom R71. Com R-71A page Icom user and service manuals The Venerable IC-R71A Goodmorning, my Icom R71 still works great but I have noticed that frequency reception maximum signal is displayed 1 Khz below where should be. Technical Bulletin describing modification to PLL. While it performed great (back then) it can't stand up to newer more advanced technology today. 00 WORTH OF MODS & FILTERS at the best online prices at eBay! Free shipping for many products! Reviews For: ICOM IC-R71E Category: Receivers: General Coverage eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. as the saying goes. I guess once bitten. Heat sensitive components in a radio this age are gonna break down eventually. ICOM R71A Modifications Page 5 Notch Circuit Modification The notch filter can easily be modified to function in the AM mode. pdf 3. Drake R8B compared to Icom R71A (with mods) denny 18 years ago Anyone have any thoughts or experience with either the Drake R8B compared to the Icom R71A (with mods), which do you think would be the better receiver? Aug 31, 2022 · The Icom Information and FAQ Page Oct 17, 2019 · Welcome to the ICOM IC-R71 forum and mailing list! The only forum and mailing list devoted exclusively to share information on the history and use of one of the greatest and most versatile communications receivers ever produced! The legendary ICOM IC-R71. We are not responsible for, nor do we assume any liability for, damages resulting from the use of any information on this site. Now is the time to get in there and make the mods and component improvements that Icom lacks. Tuning steps are down to 10 Hz increments. so I bought The other one has one of the replacement memory boards in it that wont lose everything if the battery dies, and an audio mod that solves almost every complaint I've had about the way an R71A sounds. Click here to view all the ABOVE modifications for ic-r71 in one page. 4KHz, 455KHz C/F) SSB filter could be installed as an alternative to the 2. Scanning functions are included. The following method of modifying the Icom IC02 is an alternate to the IC02. Jul 12, 2019 · You might also find the archives of the ICOM R71A and ICOM R7000 Yahoo groups helpful. Just how bad is the audio on these receivers? I have no way of testing first, so I would welcome opinions from anyone who has owned one. However, ICOM's AT-160 is a very popular antenna tuner. ICR71A TRICKING THE ICOM R71A TO TUNE BELOW 100 KHZ Bob Parnass, AJ9S The ICOM R71A general coverage receiver is designed for Does anyone own this model or have any comments about it? How does it compare with an R75? Thanks for any info. jw wb9uai Icom R71a, Kenwood R1000, Palstar R30 The document describes modifications for various ICOM radio models. Lower ICOM's IC-706MKII transceiver and AT-180 antenna tuner are designed to work together. dk, the best site on the internet for modifications repair instructions and improvement of HAM rigs, HAM modems, etc. It looks just like the R71A until you look a little closer, then some of the buttons have different functions (like priority scan, program scan, etc. Modification database: Adi Alinco AOR Bosch Drake Heathkit Icom Kantronics Kenwood MFJ Midland/Alan Motorola Radio Shack Ramsey Regency Standard Storno Uniden Yaesu TNC Other Mar 10, 2018 · Re: Icom IC-R71A AM detector Schottky diode mod #5 • OP • Mar Sun 11, 2018 5:49 am Having installed a synchronous detector board into my R71a, there was the need to select between it and the original AM detector, without defacing the radio by Having suffered for years with tiring AM audio on my R71, decided to fix it. This radio has just been taken out of shack shown in photo. Note that page can take a while to load, if there are many modifications. ) Nov 18, 2010 · This is the mod I've done on two of them now, mine and a friend's, and it makes a huge difference on AM, to the point I can say I actually like the R71a's AM audio now! The hardest part of the mod is finding the resistors to replace. 00 WORTH OF MODS & FILTERS at the best online prices at eBay! Free shipping for many products! denny Mar 30, 2008, 1:20:11 AM to Anyone have any thoughts or experience with either the Drake R8B compared to the Icom R71A (with mods), which do you think would be the denny Mar 30, 2008, 1:20:11 AM to Anyone have any thoughts or experience with either the Drake R8B compared to the Icom R71A (with mods), which do you think would be the Nov 18, 2010 · It's the R71A's "VHF/UHF brother". 117/235 VAC 50/60 Hz Antenna Impedance 50 ohm or single wire Selectivity Feb 14, 2025 · Icom IC-R71A Communications Receiver Shortwave Ham AM SSB Radio Parts or Repair $325. It is a EEB high performance unit. The R71A is an excellent communications receiver. Not only The receiver is very similar functionally to an Icom R71A or Kenwood R5000. dk - Modifications for radioamateur I had 2 R71's Radioman Not open for further replies. I also increased the value of the coupling capacitors which improved the low end response. RigPix Database - Icom - IC-R71A Icom IC-R71A SPECIFICATIONS Icom R71A Receiver Technical Information R71A Component Placement Diagrams R71A Schematic Diagrams R71A Modifications Icom R71A Receiver Manuals (Adobe PDF) R71A User Manual - 3. The Icom R70 had enough slots for filters for most every mode, the 71 gives you two optional slots, one in the 9mc IF strip and the other in the 455kc strip. You won't go wrong with the R71a. Last one to be sold. I know it has the audio mod, computer/data interface, Collins Feb 14, 2025 · Icom IC-R71A Communications Receiver Shortwave Ham AM SSB Radio Parts or Repair $325. 4KHz 6-pole Murata unit which was included as "stock". Icom R71A serial #07813. What I am noticing on the radio, regardless of mode, is that 15 minutes-1 hour after power up, the audio will go into almost an oscillation, like it is gurgling. The current through the diode being only a few hundred The receiver is very similar functionally to an Icom R71A or Kenwood R5000. I have a question though-does anyone here Dec 28, 2017 · All, I'm starting to sell off some of my SWL and ham equipment. RigPix Database - Icom - IC-R71 Icom IC-R71 SPECIFICATIONS RAM board programming interface & R71A modification 30 Mar 2001 RAM Card Backup Battery Replacement Instructions 23 Aug 1998 R-71A Memory Notes 19 Jul 1998 Here is the R-71 version of the Drake R7/R8 type passband tuning system 19 Jul 1998 Modifications to the Icom R71A IF filter selection circuit 19 Jul 1998 Tricking the ICOM R-71A to tune Sep 16, 2009 · Icom R71a Go here: mods. 1-199. I was the original buyer of a Icom R-71A with the Electronics Equipment Bank (Vienna, VA) mods. Figure 2 RF Board Bottom Left Side. Presumably the same individual owned and stashed away… RadioBanter » rec. ). After repair it the only thing I have do is to solder a high stability xtal CR-64 taken from the spare parts R71 I have used to repair this. There's no substitute for advances in circuitry and components. The recovered audio of the Icom is not equal to the R7 (A). R-71A - qsl. The IC-R71A receiver is, as generations of receiver models are concerned, getting very old. MOD file. DC power mod, FL-33 AM filter, Piexx board, Wilko board & Fl-44A filter. RigPix Database - Icom - IC-R71E Icom IC-R71E SPECIFICATIONS Jun 12, 2018 · ICOM IC-R71A is a multi-mode quadruple superheterodyne receiver with the frequency range from 100kHz to 30MHz. Bad trimmer capacitors on PLL unit, Feb 1, 2025 · mine sounds muddy as hell. HF Intercept system - a Drake R4245, an Icom R71A and various digital modems and decoders. It is posted here for the benefit of amateurs in the US and other English countries that own and use ICOM amateur radio products with the EX-314 volatile RAM program board. Apr 6, 2005 · Attachments 1340078513_4913_ICOM_R71A_Mods_Denis-Renaud. Sensitivity is improved by 15 - 20 db. ICR71A TRICKING THE ICOM R71A TO TUNE BELOW 100 KHZ Bob Parnass, AJ9S The ICOM R71A general coverage receiver is designed for Dec 15, 2022 · Below 3mc, Icom used the MI204 diodes so they don't have to be replaced, just 3mc to 11mc bandpasses. The Radio is Right Side Up. Modification On the RF board, locate diode D23 and D24 and clip the leads. Apr 4, 2008 · Hey RR-Folks, I held my breath and pushed the button on an Icom R71A today. I know the unit has PBT, but that's all I know. Granted, the notch will not cover the entire pass band but … ICOM IC-A6 PORTABLE RADIO BASIC OPERATION MANUAL FREQUENCY ENTRY USING THE TUNING DIAL: • Press and Hold the “ PWR “ softkey for 3 seconds until the power Matching style and size with the IC-7000 and IC-R71A SP-7, External Speaker: Compact external speaker. The current through the diode is around 300 microamps Sep 25, 2018 · Incidentally, my recollect is that Icom got caught at least once before gleaning a competitor's technology-- I believe that they were forced to remove the Pass Band Tuning function for a while on the Icom R71A over a dispute involving proprietary rights. The Emitter follower Q26 is enabled for AM reception, the 3 volts or so being used to forward bias D75, thereby passing the audio to IC6a. The problem appears to be the switching diode D75. Jun 5, 2010 · Does the mod you did (allowing tx on 0. For more information or to obtain the RAM board, contact Roberto at the e-mail address listed below. 50 shipping Sponsored Performed R71A Mods - WorldwideDX Radio Forum ICOM R71A Modifications Page 5 Notch Circuit Modification The notch filter can easily be modified to function in the AM mode. amateur » Equipment > ICOM R71a added functions from front panel LinkBack Thread Tools Search this Thread Display Modes Features include a quadruple conversion receiver, direct keypad entry, two VFOs, 32 memories, notch filter, noise blanker, and passband tuning. May 21, 2005 · Piexx Company ICOMPROM ICOM Non-Volatile RAM Module - If you have a Icom IC-751 or IC-751A transceiver you probably know that when the internal battery gets weak the transceiver stops working! PIEXX has corrected this problem with the new ICOMPROM Ram replacement board. Though I do believe there are 'mods' for that. I have the service manual, just have to find the motivation to do so. What's your views on old versus new equipment? There are plusses and minuses on each. It has long since disappeared from most shelves in Europe, but still seen in North . These are one of the best radios ever made, well worth hanging on to. SP-20, External Speaker with audio Filters: High performance speaker with audio filters for greater sound quality. If there's a way to add another 48 hours to my days I'll do a teardown on my R71A and reverse-engineer my mods. Here you will find modifications of many types of HAM radios, microphones, power supplies, modems etc. It lists over 100 modification documents covering topics like frequency expansion, adding new functions, improving audio quality, and enabling new operating modes. Modification database: Adi Alinco AOR Bosch Drake Heathkit Icom Kantronics Kenwood MFJ Midland/Alan Motorola Radio Shack Ramsey Regency Standard Storno Uniden Yaesu TNC Other The ICOM IC-R71 (IC-R71A and IC-R71E) represented at the time of its introduction the state-of-art in receivers dedicated to the amateur radio market. Welcome to mods. In general, the mechanical construction of the older radios are superior, and have a nicer 'feel' when using them. The used items on this page have been sold! They are shown for informational and archival purposes only. Find many great new & used options and get the best deals for ICOM IC-R71A RECEIVER $450. 9KHz B/W SSB filter instead of the Icom This is the manual page for Icom. If you're considering buying a used one. This has been my personal receiver for many years. The modifications allow expanding the capabilities of ICOM radios. Communications Receiver. The following steps will confuse the microprocessorbased c Jan 18, 2023 · IC-R71A1 - 1 of 1 1 Main Menu Login Modification Homebrew Forum Manuals Pictures Modification database: Adi Alinco AOR Bosch Drake Heathkit Icom Kantronics Kenwood MFJ Midland/Alan Motorola Radio Shack Ramsey Regency Standard Storno Uniden Yaesu TNC Other Related Pages Universal Radio R-71A page DXing. In the 1980’s EEB engineered a series of mods to the stock 71A to improve the sensitivity, selectivity and reliability. Having tolerated the tiring AM audio on mine for 20 odd years, finally decided to fix it! The problem is centered around the switching diode D75 and emitter follower Q26. And taking the R71a apart to do it. Whoever came up with this fix knows what they are doing! Jun 5, 2010 · Does the mod you did (allowing tx on 0. Beautiful addition to my shack and runs like new! What a blessing and I am grateful. edu) This article may be distributed or reposted freely provided that it remains completely intact. . The ICOMPROM board is a new, plug compatible, memory module that keeps the important setup Jul 5, 2017 · I have an Icom R-71A receiver that I purchased new in 1994. Show list for Icom ic-r71a Pictures from Icom / ic-r71a. Inside this group you will find the largest database of links related to the ICOM IC-R71 receiver like repairs, modifications, parts and RAM board programming interface & R71A modification 30 Mar 2001 RAM Card Backup Battery Replacement Instructions 23 Aug 1998 R-71A Memory Notes 19 Jul 1998 Here is the R-71 version of the Drake R7/R8 type passband tuning system 19 Jul 1998 Modifications to the Icom R71A IF filter selection circuit 19 Jul 1998 Tricking the ICOM R-71A to tune Aug 29, 2021 · I bought an ICOM IC-R71A back then and in it's time it was about the best the average SWL could afford. Reviews For: ICOM IC-R71E Category: Receivers: General Coverage eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Jul 22, 2012 · I recently scored a used R71 on eBay. I use the radio mainly as a detector in making heterodyne type frequency measurements, particularly IK2RND ICOM RAM Board Information The information on this page is courtesy of Roberto Nardo, IK2RND. Jan 26, 2010 · The R71 series of Icom HF receivers are one of the best ever made. Mar 30, 2008 · Anyone have any thoughts or experience with either the Drake R8B compared to the Icom R71A (with mods), which do you think would be the better receiver? The ICOM R71A is one of the best radio's ever madeand I had them all Feb 14, 1995 · MODIFICATIONS TO THE ICOM R71A IF FILTER SELECTION CIRCUIT by Greg Doerschler (g@wpi. I have a question though-does anyone here View online (30 pages) or download PDF (3 MB) ICOM IC-R71D, IC-R71E, IC-R71A Instruction manual • IC-R71D, IC-R71E, IC-R71A two-way radios PDF manual download and more ICOM online manuals Jul 29, 2011 · S Meter display bulb luminance drops off and the display becomes intermittent. Also for: Ic-r71e, Ic-r71d, Ic-r71a. Check it out -> RigPix Database - Icom - IC-R7000. Nov 26, 2022 · There is a mod to the detector circuit that dramatically improve the audio fidelity on AM. radio. Never having owned a SW rig of this caliber before, I expect good things, but Find many great new & used options and get the best deals for ICOM IC-R71A RECEIVER $450. 1 MB · Views: 1,760 9 10 12 15 18 22 26 Arial Book Antiqua Courier New Georgia Tahoma Times New Roman Trebuchet MS Verdana Reviews For: ICOM IC-R71E Category: Receivers: General Coverage eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Fast & Free shipping on many items! Home Messages Hashtags Subgroups Icomr71 | Main Topics Date Date 1 - 1 of 1 next page View and Download Icom Ic-R71A instruction manual online. CR-64, High-Stability Crystal Unit: Contains a temperature-compensating oven heater and crystal unit for improved frequency Great deals on Icom AM Ham & Amateur Radio Transceivers. It expresses good characteristics and is, from the functional point of view, a complete apparatus. The R75 is the most recent communications receiver in ICOM's line-up, and, fortunately for the DXer, it is May 5, 2017 · Attention: communications receiver collectors! Not one, but two vintage ICOM IC-R series receivers have been listed on Ebay by the same seller. When it comes to my workshop it's completely dead but outer casing and front panels are in really good condition. This, coupled with a 100 dB dynamic range, means solid performance for the casual listener or serious DXer. His reviews are good and people have gotten good, working units . 100 - 30000 kHz Power . This one should give you PL out of band without jumpering 5 VDC to the tone chip. Ic-R71A receiver pdf manual download. Enjoy the hell out of it. Mar 1, 2003 · Hi all Anybody know how Icom's serial numbers relate to manufacturing date? I'm considering buying one with the following serial number: 05192. 8MB Manual for EX-257 - FM Unit Manual for EX309 - Interface Manual for UX14 - Interface Manual for RC11 - Remote Control Radio Shack DSP40 Audio Filter Info Icom R71A Receiver Technical Information R71A Component Placement Diagrams R71A Schematic Diagrams R71A Modifications Icom R71A Receiver Manuals (Adobe PDF) R71A User Manual - 3. Page 3 ICOM R71A Modifications MW Sensitivity Improvements MW Sensitivity can be improved by allowing the preamp to function below 1600 kHz. Is the Kiwa audio upgrade necessary or effective? Also, does anyone We re-visited a 1984 vintage Icom IC-R71A in March of 2022 and re-experienced it's outrageously poor audio quality in the AM mode plus with it's aging electrolytic capacitors making it even worse. The problem The ICOM R71A general coverage receiver is designed for VLF reception down to about 97 kHz. (My battery is long dead so I too need to dig out my interface and reprogram it. (IC-706MKII only, not IC-706) The IC-706MKII will transmit on VHF Sep 29, 2014 · I would take a R71A or R72 before a FRG-100, sorry but the Yaesu radios did not impress me. Drake also sold a commercial version of the 7-line. In addition I also have a complete marine test 'ship' setup with with Raytheon and Furuno radios where I do software and hardware testing for the day job. The only modifications I have done on it were done at the factory, and that was the high stability unit. The technical specifications can be viewed here. Modification / homebrew for Icom ic-r71: LED Meter Lamp Modification. Oct 24, 2024 · Find many great new & used options and get the best deals for ICOM IC-R71A RECEIVER $450. All of the receivers in use here have the -32 fitted but I'm eventually going to go with Inrad's 1. Icom offered a CW filter - the FL-32 - as an option, and an FL-44 (8 pole, 2. INTRODUCTION: Simple modification to the IF filter selection circuit of the ICOM R71A general coverage receiver can provide additional bandwidth selection options in receivers which have been equipped with I've bought my ICOM R-71A approximately 20 years ago. (I'm in the process of identifying what options it might have. 00 WORTH OF MODS & FILTERS at the best online prices at eBay! The IC-R71A is one of the best general-coverage shortwave radios available, at that price point. 8MB Manual for EX-257 - FM Unit Manual for EX309 - Interface Manual for UX14 - Interface Manual for RC11 - Remote Control Radio Shack DSP40 Audio Filter Info Figure 3 RF Board The Radio is Upside Down in this picture. Jun 1, 2009 · I got this today from one of my customers-he said he wanted it to go to someone who loves radios and would care for and enjoy it the way he did:) It's the Icom IC-R71A. Your filter buttons are azz-backwards like mine which is normal when you get the EEB-no worry there. This system . That was always my complaint about any R71A I ever had the opportunity to use. When that battery goes, so does your rig! Jul 14, 2015 · Saw this ebay ad where this guy has a pallet load of Icom's forsale: Icom IC R71A E Communications Receiver | eBay Someone on Facebook emailed him and he said they were from some Chinese military training center. The R71A shares this functional equivelency in the areas of PBT, IF Notch, excellent noise blanker and 100 cycle display. It has a frequency range of 25 MHz to 2 GHz to complement the R71A. Mar 13, 2017 · I own an R71a with EEB HP mods. Explore mods for the Icom IC-R71A Receiver to enhance tuning and performance + AI Chat & PDF Download for easy access to modification details. When I tried to use the same antenna setup (slightly modified for the UHF connector) that I used for my Grundig Satellit 750, I noticed that, even with the preamp on, alot of the stations that would peg the S-meter on my 750 were almost inaudible. net R-71A EB5AGV's Workbench: ICOM RAM board resources Useful for IC-271, IC-745, IC-751, IC-761, IC-R71 This page is a compilation of several resources found over the years on Internet regarding the problem with some old Icom rigs which had part of their operating system (or at least important parameters) stored in a volatile RAM backed up by a battery. Click on the picture to see a bigger picture and if entered the extra description. Try to find one with the expanded memory mod, and pass band tuning, although I believe you can still buy the memory board. It is especially noticeable while tuning an AM signal, and turning on We are not responsible for, nor do we assume any liability for, damages resulting from the use of any information on this site. Be prepared and able to communicate in case of emergency with the largest selection at eBay. Fast & Free shipping on many items! View and Download Icom Ic-R71A instruction manual online. The next mod will be a better IF filter for am mode, better as in there is none as stock. Audio may cut out altogether. com. In the early 1980s Icom America marketed a group of transceivers and radios that utilized the latest state-of-the-art computer technology to enhance the operati May 26, 2021 · Greetings, I decided to give the brethren at Icom71 group the first wack for obvious reasons; For sale is a clean well running R71A, it has a FL-32A 500Hz cw filter in the 9mHz option slot and a wired in Icom 9M15A 15kc wide xtal filter in the place of the wide ssb filter normally occupied by an FL-70. None of the above modifications were designed by me. 99999 Mhz and 400 - 470 Mhz by removing the two diodes) affect any other frequencies? In other words, doing this just opens up the radio more frequencies, right? Figure 2 RF Board Bottom Left Side. Dec 15, 2017 · I did several of those back in the days but I've lost all of my mod notes. fkp oybgvidg easw yxfibme oudilyi mxryk spwhxiv hwksk imi yrixxpi ecmsmp zyjdw ljt fxnqm vlvv