Drake r4b mods. There are few mods for the R4B.

Drake r4b mods Contesting Online - Amateur (ham) radio contesting community web site featuring news, articles, forums, links, and surveys Modification / homebrew for Drake r-4b: Get the best from your Drake R4B receiver DRAKE R4Bs are not perfect, only nearly perfect. Drake Virtual Museum - Sindre Torp BAMA - Drake Manual and Schematic Archive Cin-Tran, Inc. Drake Radio Modifications Drake Home Page WB4HFN Home Page Drake R4C Receiver Evolution Of Three Versions Drake 4-Line Internal Digital Frequency Diaplay, by Mark Gilger / WB0IQK New INRAD 2. The frequency is 'programmed' by installing the appropriate crystal - one of up to 23 into the sockets behind the band selector switch. 0 RV3 and RV4 Remote VFOs 9. Drake Co. Modification / homebrew for Drake r-4b: Get the best from your Drake R4B receiver T4X Series AM Mode M Written by: Mark Gilger, WB0IQK The process of modification and total restoration of my R-4C, includes a filter FCN PRO shape factor < 4 in the first FI. T4X Series AM Mode M Written by: Mark Gilger, WB0IQK The results are worth the design and R&D effort. The seller said the audio was distorted. drake mods for r4b and r4c models by ve3efj . On either series, a healthy receiver should exhibit noise peaking on all bands as the preselector is adjusted with no antenna connected. 2 T4any Mods and Tech 6. Note: many people don’t consider the R-4C to be an upgrade to the R-4B. 1 R4C Change Summary 5. Drake R4 Manual Drake R4 Receiver manual. For fun, place an R4B next to any mid priced foreign transceiver and try an A/B comparison. When you buy an R4B, there is not much else to get EVERYTHING is there that you need - noise blanker, calibrator and 4 selectivity settings. Attached is a PDF for installing a PD-4 in an R-4B. Using the Drake TR-7 (A) "Store" Switch To Add A Transmit Key Function, by: Ron Baker / WB4HFN R4C Receiver power supply modification using LM7812 regulator, by: Ron Baker / WB4HFN I have a mod for this further on with much greater detail. 8Khz Filter For the TR-7 (A), by Jeff Covelli / WA8SAJ Drake TR-7 Front Panel Transmit Power Control, by Jeff Covelli / WA8SAJ The results are worth the design and R&D effort. Dec 31, 2024 · There are some parts for all the kits that have become harder to source from new old stock. Dec 25, 2021 · Cut sheets describing Sherwood and Sartori mod kits for R-4B/C. Drake Mods - R4 Mods and Tech Authored by VE3EFJ 4. 2 TR4 Mods and Tech SPR-4 10. L. This modification will enable the user to slow the AGC response, when the AGC switch is in the “Slow” position. Drake SPR4 Review "Receivers - Chance or Choice", Grove Press Drake R7 Review "Receivers - Chance or Choice", Grove Press New Audio Amp for the R4C Ham Radio, Apr, 1979 Sticky VOX Relay on the T4X QST, Jan, 1983 Easy Drift Cure - TR7 QST Reviews For: Drake R-4B Category: Receivers: Amateur Radio eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 3 T4 Reciter 7. It is extremely sensitive and stable. 3 TRANSMITTING (GENERAL) Low Transmitted Output Many things can cause this, of course. The TR7 (and possibly other equipment in the '7' series) requires a fairly high skill set to service properly. Here's how it works Modification / homebrew for Drake r-4b: Get the best from your Drake R4B receiver The N4YG DDS (Digital) VFO and the Drake TR-7, by Floyd Sense / K8AC Installing the X-Lock-3 in the Drake TR-7, by: Pete Juliano / N6QW Drake L-4B, Table Top Amplifier Redesign, by: Ron Baker / WB4HFN Drake TR-7 Improvements - Installing X-Lock VFO Stablizer / KI4GIN The Drake TR-6 and TR4 Series AM Filter Up Date, by: Jeff Covelli / WA8SAJ Modification / homebrew for Drake r-4b: Get the best from your Drake R4B receiver Consider Drake your only commercial repair service area, especially in the case of the TR7. 0 SPR-4 This all solid state receiver is a essentially a solid state general coverage R4B. G3ZPS Drake Collection My first bit of Drake gear came along in 2002 when a friend was selling stuff on eBay. The following modification puts the new capacitor in Jul 10, 2024 · Get the Best from your R4B Modifications for the DRAKE R4B receiver in a single PDF file Hits: 573 Find more links about Drake R-4B with Google Custom Search Engine Search Drake R-4B with DuckDuckGo or with Bing R. The reason for this is that if you screw up (say) a Kenwood mod, you just put the mess in a box, take it to a dealer and throw some money at him. I would of course be more than happy to see someone run a new batch of boards. Download this PDF file that describe improvements of your Drake R4B. Have a look at the following. I bought his R4B for a bit of nostalgia and was hooked on the great audio, an immaculate T4XB came up soon after and suddenly I owned a Drake '4' line. There was also a Sartori mod that injected the LO signal into the third mixer from the bottom end of the secondary of the 3rd mixer grid input transformer. All Drake receivers in this series are sensitive and selective. L. The simple, and safe way to buy domain names No matter what kind of domain you want to buy or lease, we make the transfer simple and safe. My other R4C, an Drake employed considerable changes over the years to this area throughout the R4C series. Drake Amateur Radio Club - W8CYE Drake List Home Page R. 1 T4 Evolution 6. Modification / homebrew for Drake r-4b: Get the best from your Drake R4B receiver Modification / homebrew for Drake r-4c: Fitting of speaker in R-4C Drake Collection Drake 2B with 2B Q-Multiplier and 2B 100Khz Calibrator Picked this 2B up on eBay. Sherwood Audio Module for R-4C Question1 - 14 of 14 1 R4 SERIES AGC MODIFICATION (R4, R4A, R4B, R4C) By: Mark Gilger, WB0IQK The stock R4 series receivers have excellent AGC characteristics. Listed under the Radio Equipment/Receivers/Drake R-4B category that is about Drake R-4B reciever. Service provided by Google FeedBurner. The B series was dual conversion, the last IF at 50 kHz determined the selectivity and provided notch filtering. As to coming up with 12 volts, could a voltage doubler be used off the filament line? You'll find this document a little different than most 'mod strings'. 1. There are few mods for the R4B. - A Company that manufactured transformers for Drake (purchased by Standex International in 2002) EB5AGV / EC5AAU Drake C Line Repair and Mods page Reviews For: Drake R-4C Category: Receivers: Amateur Radio eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 0 R4B AND R4C MODS AND TECH drake mods for r4b and r4c models by ve3efj . Even though the stock AGC performs very well, I thought there was room for improvement. 1 SPR-4 Mods and Tech 10. 0 AC4 Power Supplies 6. 2 4. 0 TR4any Transceivers 9. Also contains details of Sherwood/Heidelman R-4C mods as published in HR magazine. 0 TR3 Transceiver (circa 1963) 8. I learnt how to respray the cabinets and get them looking like new. Share this link with your friends, publish within popular social networks or send it via email. 2 . Improvement in an early R4C can be rendered by installing a pair of back to back diodes from the junction of C53 and C52 to ground. Authored by VE3EFJ 10. 0 R4B and R4C Mods and Tech 4. Drake Resources R. Mar 15, 2022 · In this blog post, I create a new calibrator and a new amplifier for my Drake R-4C ham radio receiver. Drake Mods - Transmitting Authored by VE3EFJ 3. Well, I'm sure you've noticed that Drake dealers are in short sup- ply these days. While it came later chronologically, and included some modern technology such as a few transistors and Drake R-4C Filters: 16-pole Receiver cascaded filter selectivity Reduce QRM leakage, overload and eliminate blanker false triggering Ideal for DX and contest work Maximum skirt selectivity with maximum intelligibility Variable bandwidth Total bandwidth with CF-2K/8 & FL2400 is 1900Hz @ -6dB & 2900Hz at -60dB Ultimate rejection better than 120dB 4. 1 Early and Late Model TR4 9. Drake SPR4 Review "Receivers - Chance or Choice", Grove Press Drake R7 Review "Receivers - Chance or Choice", Grove Press New Audio Amp for the R4C Ham Radio, Apr, 1979 PIN Diode Mods If you have even measured a real difference, please e-mail and tell me what radio it was and what the test conditions were. 0 T4 Series Transmitters 6. Drake R4B Modifications Drake Mods for R4B and R4C models by VE3EFJ. Background I’m relatively fond of these old drake tube ham radios, and I decided to upgrade my R-4B to an R-4C. There is something we can do. I’ve ordered the Drake 2B capacitor kit from haysee… Reviews For: Drake R-4B Category: Receivers: Amateur Radio eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. pdf" and "R-4C Sherwood Mods w Partslist_20210815_0001. A Crystal Filter for the R4B QST, Jan, 1972 Drake TR7 Review QST, May, 1979 Drake TR4 Review QST, Dec, 1965 The unit in question is the 'early' model TR4. This mod follows good engineering practices and one of my R4C receivers has had this change. This might help: Dec 29, 2024 · VE3EFJ third mixer mod for the R4C1 - 20 of 30 1 2 Enclosed is a list of Drake related articles, reviews and publications: A Crystal Filter for the R4B QST, Jan, 1972 Drake TR7 Review QST, May, 1979 Drake TR4 Review QST, Dec, 1965 The unit in question is the 'early' model TR4. Now, an R4B cannot compete in the selectivity sweepstakes against a radio 20 odd years younger, but have a listen to what the B sounds like and watch/hear the AGC do its thing. With a low capacity 'scope probe, you should have about 45 to 50 V P/P on the 6JB6 control grids for full output on either the T4any or TR4any. See also "R-4C Sherwood Audio Amp_20210815_0001. pdf". bp rg p5zna 5xpn 983hwy r1ez q7 bi yztgylw ym3