[Boatanchors] Bud Radio Frequency Calibrator question

[Richard Knoppow]

     There were about four versions of this tube, three are 
identical the other has a slightly different pin arrangement. It 
is a combination of a half wave rectifier and pentode amplifier 
with a 117V filament.

On 2/3/2021 4:00 AM, n2lxm at juno.com wrote:
> Greetings Dave,
>
>          I think there were two model 90 Calibrators. One used an 6SK7 and
> got it's power from the receiver it was hook up to. The other one used
> the 117L7GT tube. If yours has a power cord, then it's theright tube.
>
>
>                                                      Jeff N2LXM
>                                            Amateur Radio Operator
>                                                        American
>                                                          Patriot
>                                       Proud Father of Two US Marines
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL