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I have the original manual for mine and it's just a TR-4C with a few added pages and a sticker added to the front cover. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent

Its important not to confuse carrier _balance_ with carrier centering. Both could be affected if the carrier frequency is off. Balance has to do with the amount of residual carrier. Too much carrier

I would echo what Richard said; you can tell if your carrier balance is off if (for example) LSB sounds muffled and USB sounds tinny. Repeat your monitor test on different bands/different sidebands.

You should always tune up FAST for the Drake gear, these are sweep tubes. One way to check the quality of the tube is to set the bias to the proper point and transmit for about 3 minutes or more using

More info needed: is this one sideband or both? Have you another microphone to test? One way of telling if the set is mis-aligned is just to try it on both sidebands. Muffled sounds like the highs are

I have a TR-4 (early model with no noise blanker) that I’ve recapped and aligned to the best of my abilities. ?It receives great and I get good TX output but every report I get back says they can

Many years ago when I owned an early TR-4 after reading the manual it became clear to me that anytime I needed to tune up on a band or another band segment I would ALWAYS go to the "X" position for

As a follow-up, this must've been operator error. I just checked and I can get output on all three 10M bands. It's only about 60W but I think that's not all that abnormal. Barry - N4BUQ

Thanks, Peter. I’ll have a look. Paul, W9AC Sent: Wednesday, April 2, 2025 2:01 PM To: [email protected] Subject: Re: [DRAKE-RADIO] TR-4Cw-RIT Paul: Check under the sub-directory of "VERSIONS".

Yes, I checked those. They all were probably quite close and I tweaked them to make sure. All three 10M bands are quite close in negative voltages and the frequencies are extremely close to what they

Mark Yes, good solutions for the fans and keeping the mains out and a simple switch to override the soft start resistor. Nigel [email protected]> wrote:

Paul: Check under the sub-directory of "VERSIONS". That's where there are three files that refer to the TR-4CW/rit in my very early K4OAH "CD". 73 Peter VE7PS [email protected]> wrote:

Tnx PS! Tonight when I come home from work I will try to look at the +10, ground, injection signal and the RIT hook up wires to see if everything is correct. It’s gotta be something simple. Mark

As I recall, there’s no TR-4Cw/RIT manual as such. I’ve been relying on the non-RIT manual with a two-page RIT addendum. But if I’m wrong…I would sure like a copy. I do have K4OAH’s TR-4C

Gary, frequently the problem with the upper 10m bands could be that the xtals aren’t there. If you have all three 10m xtals, look in the alignment section on aligning the three band oscillators (L1,

*versions of the 4-line PTO's I had not heard this before. That's a staggering amount of engineering changes on a relatively small (important) circuit element. John K5MO On Wed, Apr 2, 2025 at

I’d seen this before. Accessing it from a phone is fiddly and if I’d remembered it, I’d have gone to a real computer to grab it. Thanks for finding it! Steve Wedge, W1ES Time flies like an

Good point Jim.....the zener is there (D6) in the late TR-4C's, and probably the TR-4CW's, but it's not in the TR-4CWrit. My bad. I recall Garey telling me he'd documented over 40 different

Thank you for that attachment. I'll give it a closer read later but the last five pictures are quite helpful. I think what I mostly confused myself was that I didn't have a key inserted so switching

Craig, The "sagging" plate current or RF output effects you saw are evidence of a soft tube somewhere in the transmitter chain. If you have a tube tester, you can try lowering the filament voltage a