You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Just to add. [USER=18156]@guitar_199[/USER] requested that I compare values to a working Sonar FS-23 that I have. It follows the same pattern as the Regency where the grid goes negative during transmit. Here are the results:

"Interesting note on the Sonar. Pin 2 of V13 (final amp 6BQ5) on the final tube is -.17vdc and when keyed it drops to -.87vdc but not to the -8.6vdc that the Sam's calls out. I wonder if that is a simple decimal point error in the Sam's or a coincidence? It starts off at 0 but slowly ticks down to -.17vdc. After unkeying it will start out at 0 and slowly tick down (-.01, -.02, -.03 etc) until it bottoms out at -.17vdc.

Pin 1 of V12 (buffer amp 6AU6) follows a similar pattern. It starts off at 0 but slowly ticks down to -.45vdc and increases to -.40vdc but doesn't drop to the -3.8vdc the Sam's calls out. Again really close values (-3.8, -.40) if you move the decimal point. If you key up before it maxes out, say at -.17vdc it'll drop to the -.40vdc.

Nonetheless, the values are still negative whereas with the Regency they never go negative even to a minute degree."

Jacob

<blockquote data-quote="Champo" data-source="post: 775712" data-attributes="member: 60887">Just to add. [USER=18156]@guitar_199[/USER] requested that I compare values to a working Sonar FS-23 that I have. It follows the same pattern as the Regency where the grid goes negative during transmit. Here are the results:&quot;Interesting note on the Sonar. Pin 2 of V13 (final amp 6BQ5) on the final tube is -.17vdc and when keyed it drops to -.87vdc but not to the -8.6vdc that the Sam&#039;s calls out. I wonder if that is a simple decimal point error in the Sam&#039;s or a coincidence? It starts off at 0 but slowly ticks down to -.17vdc. After unkeying it will start out at 0 and slowly tick down (-.01, -.02, -.03 etc) until it bottoms out at -.17vdc.Pin 1 of V12 (buffer amp 6AU6) follows a similar pattern. It starts off at 0 but slowly ticks down to -.45vdc and increases to -.40vdc but doesn&#039;t drop to the -3.8vdc the Sam&#039;s calls out. Again really close values (-3.8, -.40) if you move the decimal point. If you key up before it maxes out, say at -.17vdc it&#039;ll drop to the -.40vdc.Nonetheless, the values are still negative whereas with the Regency they never go negative even to a minute degree.&quot;Jacob</blockquote>

[QUOTE="Champo, post: 775712, member: 60887"] Just to add. [USER=18156]@guitar_199[/USER] requested that I compare values to a working Sonar FS-23 that I have. It follows the same pattern as the Regency where the grid goes negative during transmit. Here are the results: "Interesting note on the Sonar. Pin 2 of V13 (final amp 6BQ5) on the final tube is -.17vdc and when keyed it drops to -.87vdc but not to the -8.6vdc that the Sam's calls out. I wonder if that is a simple decimal point error in the Sam's or a coincidence? It starts off at 0 but slowly ticks down to -.17vdc. After unkeying it will start out at 0 and slowly tick down (-.01, -.02, -.03 etc) until it bottoms out at -.17vdc. Pin 1 of V12 (buffer amp 6AU6) follows a similar pattern. It starts off at 0 but slowly ticks down to -.45vdc and increases to -.40vdc but doesn't drop to the -3.8vdc the Sam's calls out. Again really close values (-3.8, -.40) if you move the decimal point. If you key up before it maxes out, say at -.17vdc it'll drop to the -.40vdc. Nonetheless, the values are still negative whereas with the Regency they never go negative even to a minute degree." Jacob [/QUOTE]

Top Bottom