Grunow 654

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Grunow 654

Arran
Phorum Expert

Posts: 4,705
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Joined: Sep 2008
City: Sandwick, BC, CA

#25

07-06-2015, 03:06 AM

(07-05-2015, 10:51 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 - 06-22-2015, 12:36 AM

RE: Grunow 654 - by Arran - 06-22-2015, 03:13 AM

RE: Grunow 654 - by Radioroslyn - 06-22-2015, 07:03 AM

RE: Grunow 654 - by vecher - 06-22-2015, 06:38 PM

RE: Grunow 654 - by vecher - 06-22-2015, 10:35 PM

RE: Grunow 654 - by Arran - 06-23-2015, 01:26 AM

RE: Grunow 654 - by Warren - 06-22-2015, 11:46 PM

RE: Grunow 654 - by jerryhawthorne - 06-23-2015, 12:17 AM

RE: Grunow 654 - by mikethedruid - 06-23-2015, 12:55 AM

RE: Grunow 654 - by vecher - 06-23-2015, 09:51 AM

RE: Grunow 654 - by vecher - 06-23-2015, 08:18 PM

RE: Grunow 654 - by Arran - 06-24-2015, 12:57 AM

RE: Grunow 654 - by codefox1 - 06-24-2015, 08:17 AM

RE: Grunow 654 - by vecher - 06-24-2015, 03:23 PM

RE: Grunow 654 - by Arran - 06-25-2015, 01:45 AM

RE: Grunow 654 - by jerryhawthorne - 06-24-2015, 03:50 PM

RE: Grunow 654 - by vecher - 06-24-2015, 04:14 PM

RE: Grunow 654 - by vecher - 06-26-2015, 04:57 PM

RE: Grunow 654 - by vecher - 07-04-2015, 04:52 PM

RE: Grunow 654 - by Radioroslyn - 07-04-2015, 05:58 PM

RE: Grunow 654 - by vecher - 07-04-2015, 08:57 PM

RE: Grunow 654 - by vecher - 07-04-2015, 11:37 PM

RE: Grunow 654 - by Arran - 07-05-2015, 02:12 AM

RE: Grunow 654 - by vecher - 07-05-2015, 10:51 PM

RE: Grunow 654 - by Arran - 07-06-2015, 03:06 AM

RE: Grunow 654 - by vecher - 07-06-2015, 10:05 AM

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