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Yes, now that I have gone through this, testing of the shunt resistor on an unknown T4 should be one of the first things you do even before you apply power. It should definitely be replaced with a

Thanks, Jim. Yes, I am aware the RV75 will work without the RIT cable but curiosity has the best of me and it appears to be an easy task. Rick K8EZB

Jones plug nomenclature on the web suggests P-3312-CCT. However, you only need this if you actually want to use RIT. The RV75 works just fine without it an honestly I have never missed it because I

I recently acquired an RV75 to use in my 7-line station. The RV75 requires a cable from the RIT SWITCH phono connector on the rear panel to the ACCESSORIES connector on the rear panel of the TR7. This

The Metal Body circular DIN connectors exist, BUT typical hobbyist & radio amateur will *Constantly Complain about PRICE*. These two (2) manufacturers are found through ALL Major Electronics

Doug: Two resistors I ALWAYS check on a new-to-me T-4XC - R49 and R59 on the T/R relay board. One of those is the 3.3 Ohm shunt resistor and the other is in the +250V supply line. Both are easy to

This is NOT a bias issue - read my original message. If anything, the bias is set too low due to an elevated shunt resistor value or opened shunt resistor. I am fairly confident that is the problem

If the plate current is pegged, it is way too much. It is also a good way to go thru your supply of 6JB6 tubes. You need to pull out the book and set the bias. It is the best ally to save the tubes.

If your plate current t is pinning with the drive turned down, you may be losing your bias connection. Clean the blades of the Jones connector with DeOxIt and a Q tip. 73, Steve Wedge, W1ES/4 Time

I am sorry but I can't remember the exact value. It is important mainly in setting the idle bias. Again you can check the current at the 15 ohm cathode resistors.? They tend to go high

OK, did a little further research. I have not checked it yet but the cathode current meter shunt is 2.7 ohms 1/2W. I see a replacement in a WB4HFN slide show uses three parallel 10 ohm 1/2W resistors.

Two sites to bookmark.K4AOH. Order Garry barrell's ca for the C line. Available from his wife. You can download them.? Not expensive.??WB4HFN. Has tons of stuff.Study the metering circuit.? Note

Now that I have the AC4 rebuilt, I moved on to the T4XC. The transmitter was given to me probably 7 years ago by a now SK ham and has been stored by me since then. Probably not operated in over 10

Jim Shorney writes: You, sir, are a Geeeenius! :-) Also, then it will match the PS-75. --lyndon

Just make it C-75 and you're good either way. 73 -Jim NU0C "Lyndon Nerenberg (VE7TFX/VE6BBM)" <lyndon@...> wrote:

VE7PS writes: Oh shut up! :-) I was in no position to afford it, but it popped up out of the blue and there was no way I was going to let it get away (just like the TR-6). I am really looking forward

Lyndon... Now you need to change the number on the console! Or buy a TR-7...... Either way...congrats on the new rig! 73 Peter VE7PS

[ ... ] I was wrong. --lyndon

Correction: It is the MRF 455 Finals I have Marty KL7AM To: "DRAKE-RADIO" <[email protected]> Sent: Saturday, March 11, 2023 8:29:10 AM Subject: Re: [DRAKE-RADIO] Drake TR5 schematic I have new

I have new matched pairs of driver transistors for the TR-5 Contact me off list if interested Marty KL7AM To: "DRAKE-RADIO" <[email protected]> Sent: Thursday, March 9, 2023 3:21:45 PM Subject: