[Milsurplus] Just had to comment - chirp

[mstangelo at comcast.net]

I stand corrected. I meant to say it was a MOPA transmitter.

Mike N2MS

> On 08/20/2024 7:08 PM EDT hwhall at aol.com <hwhall at compuserve.com> wrote:
> 
> 
> 
> 
> > The Philmore NT-200 is a two stage transmitter so I do not consider it a MOPA transmitter.
> 
> 
> I'm not sure I understand that. I assumed that if the oscillator is a different tube than the final amplifier, then that was the meaning of a MOPA.
> 
> Wayne
> WB4OGM
> 
> On Tuesday, August 20, 2024 at 07:51:00 AM MDT, mstangelo--- via Milsurplus <milsurplus at mailman.qth.net> wrote:
> 
> 
> Thanks to all about the information about the Bruce Kelly and Philmore transmitters. The Philmore NT-200 is a two stage transmitter so I do not consider it a MOPA transmitter.
> 
> Does anyone remember the W5LET had single tube transmitters in Electronics Illustrated?
> 
> I built one using the 6AQ5A tube and it exhibited less chirp than my AC-1. It specified and coil only available from Allied Industrial division and had a long time delivery so I substituted a 4.5MHz television IF coil and it worked like a charm.
> 
> A copy of the article starts on page 100:
> 
> <https://www.worldradiohistory.com/Archive-Electronics-Illustrated/Electronics-Illustrated-1967-03.pdf>
> 
> Mike N2MS
> 
> 
> 
> > On 08/19/2024 10:16 PM EDT Robert Nickels <ranickels at gmail.com> wrote:
> > 
> > 
> > On 8/19/2024 7:59 PM, Hubert Miller wrote:
> > 
> > > Philmore had a one tube Novice type transmitter, but not many sold, quite rare. 
> > Hue,
> > The Philmore NT-200 is a MOPA with 6V6 oscillator and 6L6 amplifier. It keys nicely - you can get the entire pictorial manual from BAMA. 
> > 
> > Did they make another ?
> > 73, Bob W9RAN
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