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Topics - Brian

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46
Very weak carrier. Faint audio. Possible female voice speaking,
Splash from very strong TX on 6195.

47
Weak dance music. ID? at 20:07 too weak to copy.

48
Strong. Playing Caroline by The Fortunes?
Slight het from 6290

49
Good signal, s9+20, but lots of static. Playing C&W.
Sudden off 2047.

50
Caught the last couple of minutes. Very strong s9. Song followed by another. Did not recognise the artists.
I went to  check another frequency and when I returned at 2103, it was off air.

51
The RF Workbench / Q about strange tuning on a valve TX
« on: June 25, 2018, 1309 UTC »
One for the valve/tube techies.
I have built, maintained, restored, operated and fried many valve transmitters over the years.
As we all know, max output power always corresponds to the dip in HT current when tuned up correctly. Or as close to it to make no difference.
I have several transmitters and in each case this is true.........except for one.
It uses 3 x 807 tubes (or valves as we call them over here) in the output. When tuned up for the dip, it produces around 130 watts or so of RF. However, if I tune for max output, I can get 150 or more watts out but the HT is no longer dipped.
This doesn't make any sense to me.
It doesn't matter what config of load/tuning I do, the max output never corresponds with the dip.

It's not actually an issue as, I'm just curious as to why this is happening and if anyone else has seen this.

52
23:10 No Matter What You Do.
          Man talking and into another song.
23:13  Speech again
          Up On The Roof.


Edit   ID of WNBC, I think
         Is this a pirate?



         Location: Ireland


         

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