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Jay, You might try the following procedure. I found this to work if the Drake procedures won't. If C19 & C25 adjustment procedure above does not work, provide a pulse source and adjust C19 and C25 for

I've been replacing my MS-4 speakers with an exact replacement that Surplus Sales sells. MS-4 SPEAKER REPLACEMENT ( Misco #JC57CD ) Sold as a Collins Replacement: Surplus Sales of Nebraska, 1218

I'd say that it all depends on how you're using the rig.? If your Drake stuff falls into the "Shelf Queen" category, then the stock MS-4 is the way to go.? My C-line is in daily use along with my

And I would highly recommend choosing the ones with insulated leads. Spend the extra money. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent from [Proton

Dean....you wrote.... OK guys, Here is an observation. I just cleaned the power connection and decided to check the bias again. All knobs turned to “0”. Now, on the RF tune I see a “0” in the

I've seen instruction manuals where you adjust the AF gain to a 'comfortable' level and use the RF gain as a volume knob. I learned to operate this way in my early days and, as I understand, it helps

The SSB lamp is a NE-2H neon. The rest are generic instrument lamps. Probably 24V since they run from 22VAC with a 150 Ohm series resistor. You might want to measure the AC voltage across one that is

In the commercial 2-way radio business this was a feature, not a bug. Kept the dispatcher from turning the volume all the way down either accidentally or on purpose. "Gary Follett via groups.io"

Hi Rob, Thank you for posting these six files. Chuck

BTW, the one with the long shaft is for balancing the carrier, along with the 10-turn pot. These three adjustments are in the same patch of real estate. Steve Wedge, W1ES Time flies like an arrow.

I turn it and it just spins and spins. doesnt seem to change anything. Ed [email protected]> wrote:

the one with the slot. If you are on frequency, you may have a bad crystal filter. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent with [Proton

Carrier oscillator is on freq. Sorry but I still dont know where C-6 is. Is it the big silver looking thing with a slot for a screw driver or the taller looking thing against the back of the chassis

OK guys, Here is an observation. I just cleaned the power connection and decided to check the bias again. All knobs turned to “0”. Now, on the RF tune I see a “0” in the 10 meter section. At

Film resistors will work fine. Use the same coils. The final tubes should be 6JB6's Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent with [Proton

Check that your carrier oscillator is at 5645 kHz. C6 is the ceramic trimmer on top of the chassis, right-rear corner area. If your CO is on-frequency, you could have a bad filter. Rare, but it

My TR7A still has the annoying feature of not going to no signal. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent with [Proton Mail](https://proton.me/mail/home) secure

Peter, Oops... I meant 6JB6A's. The NOS 6JB6A tubes I see for sale are never listed as "matched pair".... is that going to be a problem? Thanks for the screen resistor advice. 73 Jay W6CJ

My T-4XC sounds decent on LSB but very tinny and pinched on USB. How do I adjust this? I saw a reference to adjusting C-6 but I can not find a C-6. Where is it? Thanks, Ed KG5UN

I don't actually know but suspect they are the same. Pillow stuffing would work OK and is likely cheaper. Anything sold for audio seems to become expensive. -- Richard Knoppow Los Angeles WB6KBL SKCC