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  #1  
Old 10-12-2014, 04:25 PM
kramden66 kramden66 is offline
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Zenith porthole 24G26 voltages of tubes

Since there is only a schematic on this particular chassis the only thing i have to go on is the service manual for the 24G24 / 24G25 , close but not quite , the 24G26 is like a cross between the 24G and 24H models , the H manual doesnt list tube voltages .
the manual for the G24 / G25 has two 25BQ6 horz out tubes where the 24g26 has two 6BQ6 tubes for horz out , so if anyone can help please assist with the pin voltages on the two 6BQ6 horz out tubes , the 6W4 damper and i guess the horz osc 6SN7 so i can make sure nothing is over driven , the set is functioning but want to make sure it stays that way , so i will post voltages that i get but if anyone has a rough idea of what the pins should show it would be helpful
thanks
mike
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Old 10-12-2014, 05:27 PM
Olorin67 Olorin67 is offline
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Since those output tubes are identical in characteristic except for the heater voltages, I would expect the operating voltages to be similar,unless the series string set used a significantly different B+ voltage.
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Old 10-12-2014, 06:32 PM
kramden66 kramden66 is offline
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Here are the voltages
6BQ6 pin 3 is 80 volts , pin 4 is 78 volts , pin 5 is -12 volts , pin 6 is -11volts pin 7 is 0 pin 8 is 7 volts

6w4 pin 2 and 3 is 475 volts , pin 4 is 355 volts , pin 5 overload - can't read , pin 6 is 70 volts

6SN7 horz osc pin 1 is -14 volts , pin 2 is 235 volts , pin 3 is 170 volts , pin 4 is -5 volts , pin 5 is 125 volts , pin 8 is 070 volts

anything look odd there ?
mike
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Old 11-02-2014, 01:31 PM
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Sparky Sparky is offline
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I have the full 24G26 section if needed. Here is a snapshot of the section you are in question of.
Quote:
Originally Posted by kramden66 View Post
Snip/ so if anyone can help please assist with the pin voltages on the two 6BQ6 horz out tubes , the 6W4 damper and i guess the horz osc 6SN7 so i can make sure nothing is over driven Snip/
thanks
mike
Attached Files
File Type: pdf 24G26 HV.pdf (119.8 KB, 12 views)
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