Sun May 13 10:46:53 EDT 2007
the 6J5 (which mine had)... the audio was on the weak side with the
I'm sorry to say I can't be of more help, I do have a diagram of my NC183
but I wouldn't do much good for anybody... Mine was rebuilt by a Bell
Labs engineer named Yut Seul Yee in the 60's, it was used as a lab IF
strip for VHF and UHF experiments... It has 717's in the dual RF and a
12AU7 for a product Detector... and then there are the mods I did...
Oh yeah... it has 2 5881's for the audio output... :-)
On Mon, 7 Oct 2002, Tommye & Jim Wilhite wrote:
> John, you and Vince raise interesting questions. The NC 183 D that I
> own has the D on the cabinet and uses 6BA6s for the first two RF
> stages and the IF stages then uses 6BE6s for the oscillator and mixer.
> It completely matches the manual except for the phase inverter.
> Upon careful inspection I cannot see that it has been modified from
> the 6J5 to the 6SN7. It uses a 6SJ7 for the first audio which
> according to the manual is correct. Serial number is 372 1029 and not
> being familar with the serial number sequence, don't know if that is
> early or not. Any other ideas?
> 73 Jim
> de W5JO
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