tube pinouts

[Kewdave]

hi, can some one tell what the small arrows on this tube pinout are or what there for. thanks, dave

[eccerr0r]

Re: tube pinouts

Goes to the 12V heater power source...

Looks like an AM superhet 5-tube radio. Usually the heater in these tubes are hooked up in series as depicted by a heater string elsewhere on the schematic that might have been cut off from the submitted scan.

[Kewdave]

Re: tube pinouts

Thank you

[budm]

Re: tube pinouts

Vacuum tube data sheets:
http://frank.pocnet.net/
http://www.tubedata.org/
http://www.tubebooks.org/tube_data.htm
http://tdsl.duncanamps.com/

[juliadream]

Re: tube pinouts

Make sure to replace C11-12-13 .. especially "that cap" C12, otherwise it's potentially goodbye output tx