[AMRadio] Re: NC-183D

[Peter A Markavage]

There are two versions of the NC-183D. As pointed out,one with 6J5 phase
inverter driving the 6V6's and the other, 6SN7 (half as phase inverter
driving the 6V6's and the other half being the S-meter amplifier). Early
NC-183D's, like NC-183's, had no S-meter amplifier. I have both
schematic's.
Pete, WA2CWA
P. A. Markavage
27 Walling St., 
Sayreville, NJ 08872-1818

On Mon, 7 Oct 2002 15:23:52 -0600 "Tommye & Jim Wilhite"
<w5jo at alluretech.net> writes:
> 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
>   ----- Original Message ----- 
>   From: W4AWM at aol.com 
>   To: w5jo at alluretech.net 
>   Sent: Monday, October 07, 2002 1:44 PM
>   Subject: NC-183D
> 
> 
>   Hi,
> 
>   Are you sure you don't have a regular NC-183?
> 
>   All that I can find shows the 6J5 phase inverter in the 183 model. 
>  Possibly you have a very early D model and there was a production 
> change.
> 
>   I have attached part of the 183 schematic showing the phase 
> inverter circuit.
> 
>   73, John,
> 
>   W4AWM 
> 
> 
> 
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