[Amps] 3CX1500A7 versus 3CPX1500A7

[Alek Petkovic]

Ha! You reckon that's bad? Put your meter probes in under the tube 
sockets and measure the filament voltage.

That's a real eye opener!

73, Alek.
VK6APK

On 10/02/2014 12:36 AM, Robert Morris wrote:
> Do you know what the voltage at the pins measure now?
>
> Unless you have a variac in line, I bet it's not 5.000.
>
> Most of the old transformers in my junk box are 115v.
>
> My line voltage, as we speak is 121 and has been know to go to 124.
>
> Calls to the power company, in summer, when they are fighting all the air conditioning and it goes to 127 and all my UPS's start yelling.
>
> A 100 watt Variac or Powerstat and a meter calibrated at the pins, fixes both issues.
>
> .
>
>
> On Feb 7, 2014, at 12:13 PM, Larry Critchfield wrote:
>
> Hi John,
> Do I have to worry about the .5 volt filament voltage for the 3CPX ??
> I do not want to modify my amp for 5.5 and then have to switch back
> to use my 8877's plus the cost of new parts.
> Thanks
> Larry
> WS3Z
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