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Grunow 654
Arran
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#25

07-06-2015, 02:06 AM
(07-05-2015, 09:51 PM)vecher Wrote:  I did check the tubes. All were Good.  However when checking them against schematic I noticed that I have a 6K6G in the place of a 6F6G. I believe it is a direct replacement but how it affects the voltage   No clue..

I lowered the input voltage to 117 volts. The B+ now reads + 330 volts using a VTVM.. The bias reads -.68 volts..  Radio still works great.. So I guess its good for now..  I guess I will put it back in cabinet and back to living room..

Thanks all

Skip...

Skip;
  I think that we have found the answer as to why the B+ voltage is higher, lower current output tube. Find either a 6F6 or a 6V6 to replace the 6K6G, the 6K6G is not a direct replacement, the plate and screen current is lower then the 6F6 or the 6V6, and the heater current is also lower, the plate impedance is also wrong.
Regards
Arran
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Messages In This Thread
Grunow 654 - by vecher - 06-21-2015, 11:36 PM
RE: Grunow 654 - by Arran - 06-22-2015, 02:13 AM
RE: Grunow 654 - by Radioroslyn - 06-22-2015, 06:03 AM
RE: Grunow 654 - by vecher - 06-22-2015, 05:38 PM
RE: Grunow 654 - by vecher - 06-22-2015, 09:35 PM
RE: Grunow 654 - by Arran - 06-23-2015, 12:26 AM
RE: Grunow 654 - by Warren - 06-22-2015, 10:46 PM
RE: Grunow 654 - by jerryhawthorne - 06-22-2015, 11:17 PM
RE: Grunow 654 - by mikethedruid - 06-22-2015, 11:55 PM
RE: Grunow 654 - by vecher - 06-23-2015, 08:51 AM
RE: Grunow 654 - by vecher - 06-23-2015, 07:18 PM
RE: Grunow 654 - by Arran - 06-23-2015, 11:57 PM
RE: Grunow 654 - by codefox1 - 06-24-2015, 07:17 AM
RE: Grunow 654 - by vecher - 06-24-2015, 02:23 PM
RE: Grunow 654 - by Arran - 06-25-2015, 12:45 AM
RE: Grunow 654 - by jerryhawthorne - 06-24-2015, 02:50 PM
RE: Grunow 654 - by vecher - 06-24-2015, 03:14 PM
RE: Grunow 654 - by vecher - 06-26-2015, 03:57 PM
RE: Grunow 654 - by vecher - 07-04-2015, 03:52 PM
RE: Grunow 654 - by Radioroslyn - 07-04-2015, 04:58 PM
RE: Grunow 654 - by vecher - 07-04-2015, 07:57 PM
RE: Grunow 654 - by vecher - 07-04-2015, 10:37 PM
RE: Grunow 654 - by Arran - 07-05-2015, 01:12 AM
RE: Grunow 654 - by vecher - 07-05-2015, 09:51 PM
RE: Grunow 654 - by Arran - 07-06-2015, 02:06 AM
RE: Grunow 654 - by vecher - 07-06-2015, 09:05 AM



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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)