Hello:
I recently picked up a Sentinal chair side model 80B.When I opened it to remove the chassis there was a small A B C battery eliminator. There is a schematic attached to the case but it does not give any values for the various components.The battery eliminator is a GTC model L made by the General Transformer Corp. The old radio was found in an old farm house,in the attic and had been there for many years. I replaced all the caps and the resisters in the voltage divider. The capacitor values are-two 20 mfd 250 volt-two 1500 mfd 4 1/2 volt-one 10 mfd 25 volt. The unit has one tube a 5W4.It also has one small selenium? rectifier. When I checked the B+ they all are approximately double.The A and C voltages seem ok. Any help would be greatly appreciated.

Dan, What is the ac voltage from the xfmr to the rectifier?

When you measured the B+, is there any chance your meter was on the AC scale?

:Hello:
: I recently picked up a Sentinal chair side model 80B.When I opened it to remove the chassis there was a small A B C battery eliminator. There is a schematic attached to the case but it does not give any values for the various components.The battery eliminator is a GTC model L made by the General Transformer Corp. The old radio was found in an old farm house,in the attic and had been there for many years. I replaced all the caps and the resisters in the voltage divider. The capacitor values are-two 20 mfd 250 volt-two 1500 mfd 4 1/2 volt-one 10 mfd 25 volt. The unit has one tube a 5W4.It also has one small selenium? rectifier. When I checked the B+ they all are approximately double.The A and C voltages seem ok. Any help would be greatly appreciated.

:Dan, What is the ac voltage from the xfmr to the rectifier?
:
:When you measured the B+, is there any chance your meter was on the AC scale?
:Hello: Thanks David and Z for your fast reply. Several of the capacitors I replaced were new to me I replaced two 1500 mfd 4 1/2volt ,one 1000 mfd 3 volt. I used some old caps I had removed from a throw away Zenith tv. One failed and two were leaking.I will have to order replacements I looked at Just Radios and A E S and I didn't see them listed Will call A E S or radio daze Monday. From memory I had over 700 volts plate to plate on the 5W4. I didn't try connecting a load-will replace with proper capacitors and try again with a load. I have my model 80 B Sentinel connected to my Arbe 111 and it works very well. Thanks again
:
::Hello:
:: I recently picked up a Sentinal chair side model 80B.When I opened it to remove the chassis there was a small A B C battery eliminator. There is a schematic attached to the case but it does not give any values for the various components.The battery eliminator is a GTC model L made by the General Transformer Corp. The old radio was found in an old farm house,in the attic and had been there for many years. I replaced all the caps and the resisters in the voltage divider. The capacitor values are-two 20 mfd 250 volt-two 1500 mfd 4 1/2 volt-one 10 mfd 25 volt. The unit has one tube a 5W4.It also has one small selenium? rectifier. When I checked the B+ they all are approximately double.The A and C voltages seem ok. Any help would be greatly appreciated.

:I will have to order replacements I looked at Just Radios and A E S and I didn't see them listed

Contact Dave from JustRadios (email), he will suggest the proper values. You do not have to replace with _exact_ values. There is a good safe margin to work with when replacing caps.

Z-

:When I checked the B+ they all are approximately double.The A and C voltages seem ok. Any help would be greatly appreciated.

Did you test the B+ with a load ? A resistor divider will not provide correct voltage unless there is a load. Try using a 1Kohms 2-5 Watts resistor as a load to the 135V section to provide around 15ma load. Then take voltage readings again.

Z-

::When I checked the B+ they all are approximately double.The A and C voltages seem ok. Any help would be greatly appreciated.
:
:Did you test the B+ with a load ? A resistor divider will not provide correct voltage unless there is a load. Try using a 1Kohms 2-5 Watts resistor as a load to the 135V section to provide around 15ma load. Then take voltage readings again.
:
:Z-