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What the PROM does is it "monitors" the N-Code fed to the Translator board from the DR7 for two purposes. The first is to disable the action of the Up or Down button when your reach the edge of a band

Another belated thanks to all others who replied. -- Ken KA4MIE

(Belated) Thanks, Nick. I have time again to work on it. I also have the TR-7 service manual which explains what the chip is doing, but I was unclear about why the two legs were broken. I'll be

I am going to be looking into this, as I have a TR-4Cw RIT that is also doing some squirrely things on 20m. I can get it to go into what I believe are oscillations on 20m when I adjust the driver, so

Hello Everyone.? I am in the last steps in restoring a TR-4C.? I have found that on 20 meters, at 14.250 MHz, when peaking the Rf tune, I can get somewhat better stronger signals.? BUT, I get much

It looks as if, as I expected, putting together a 20m net would have fewer scheduling conflicts if done on a Saturday. Does anyone have a handy list of 20m SSB nets? I'm looking at around 1630 eastern

Here is a view of the FUNCTION switch in my late production T-4X. 3 decks, like the B. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS

Wow! I didn't know they went up that high! This shows that Drake had issued serial numbers by stamping the chassis first, I would say. The first T-4XB in Ron's database is 13434, so there's definitely

Hi, gang! I have my T-4X in front of me. I was fortunate to have obtained my A Line from a friend who had had it in storage for around 20 years. I have replaced the can cap and other electrolytics but

Looking for the above shipped to 99645. I can send a shipping label Tnx! KL7AM

You're right Gary.... I operate way more often using vintage (Drake &? Hallicrafters and other old marine)? radios than newer stuff and have actually had amateurs "break in " just to tell me and the

I think you are right Mark. I just hurts those guys to work off "CHANNEL". 73, Gary WB6OGD

Rick, I think the 0.5 kHZ is for those operators that do not have a real or vintage radio(s). Ya know the ones that have those blasted radios with the digital/pan adapter screens or the radios in a

Steve, I think you were asking me the serial number of my T4XB is 15349 Dave

Peter, Yes, it's the T4XB that I need the switch for I'm not sure if the T4X is the same, also Steve mentioned that the T4XC is different and he is correct on this the T4XC switch will not work. These

I'll be sitting down later today and putting all of these nets into a matrix. It seems that Saturday has more availability from a number of nets/time-scheduling standpoint. I'll identify the times

Yes. You can also tell by the newer ball detent that's held in place by a leaf spring. What is the serial number of this one? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana.

Thanks Steve, you are da man. I must have a late T-4X, can't tell because the serial number rusted away, hi hi. I will pull it out today or tomorrow and take photos, Dave pull yours and we can see if

IIRC, the last T-4X's have a switch layout that is identical to the T-4XB and they have the same number of wafers, whilst the earlier T-4X's had one less wafer. I was going to try and update a T-4 to

The very latest T-4X’s have the same switch. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS