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Re: Only showing 9MHZ on DD-103


 

Looks like R48 on the marginal scans of schematics that I have. 100 Ohms feeding the grid. C12 would be included in "checks around V1".

On Fri, 18 Apr 2025 21:06:38 -0400 (EDT)
"n4buq via groups.io" <n4buq@...> wrote:

Did you possibly mean R148?

Also, the signal would go from that resistor through C12 to the grid.

73,
Barry - N4BUQ

Here is your circuit. The PTO feeds the grid of V1B via R48. I think I would
look at R48 first, then make some checks around V1.

Disclaimer: I have not been inside any TR4 in decades.

On Fri, 18 Apr 2025 16:25:17 -0700
"Mark N2DMI via groups.io" <markkiziuk1@...> wrote:

I connected the wires back up to the PTO and again no signals!
I then put the spectrum analyzer close to the PTO signal output to see if the
signal was being loaded down and I still have signal output that tracks the
PTO.
Out of curiosity I connected my working DD-103 to the jones connector and it
reads 9Mhz.

--

73

-Jim
NU0C







--

73

-Jim
NU0C

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