[Drake] S-meter

[Garey Barrell]

Ron -

Check the cathode voltage readings on V4, V11, V15 and V17 in receive 
with no antenna or signal.   The S-Meter should read about S3 or S4 with 
1 uV and about S9 at 50 uV.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>



bonddaleena at aol.com wrote:
> Hi. Long time since I've posted to this list. A recent posting brought 
> the 'ole brain back to life.....
> I 'might' have asked this before, so excuse me ahead of time if I 
> have. (got CRS, you know...ha ha)
>
> Anyway, I have quite a nice Drake collection. I have a mint TR4-CW and 
> also what I have nicknamed, "The World's UGLIEST Drake", a TR-4C.
>
> I bought this radio off of ePay, er. eBay a couple of years ago, for 
> cheap. I bid on the poor thing, because it came with a pretty nice RV-4C.
>
> The radio was honestly described as 'awful'. It appeared to have spent 
> some of its life under water. ha ha. Anyway, I got the radio cheap (no 
> shipping) and the RV-4C, Power Supply, etc.
> The radio IS, (I hate to say 'FUGLY'), mismatched knobs and all. 
> However, I realized it had a good noise blanker, which I put in the 
> TR-4CW. I modified the RV-4C into a RV-6 with new dials, etc.
> I just could NOT bring myself to part out the old girl. Finally (!!), 
> I got the radio working. Believe it or not, it plays as well as the 
> rest of my Drakes, with one exception: the s-meter is VERY scotch.
>
> I have studied the schematic, the theory of operations, even SWAPPED 
> meters and it still reads low. The actual sensitivity is the same as 
> the other Drakes, the s-meter just reads low, but it DOES function. I 
> have replaced all the pots, etc in the s-meter circuit, but nothing 
> helps.
>
> Anybody have ANY ideas???
>
> By the way, the radio is SO ugly, that I will NOT even try to restore 
> it. And believe me, I CAN polish a tu*d and make it look new. I just 
> keep it in this condition to show my buddies. Yes, it is covered!!! ha ha
>
>
> thanks, sorry for the long description, but, you know.....
>
>
> ron
>
> N4UE
>
>