[AMRadio] Ham mods (was Re:SP600 Question)]

Brett Gazdzinski Brett.Gazdzinski at verizon.net
Tue Sep 15 20:04:00 EDT 2009

I always thought the fun part was improving things.

I have KT88's as modulators in my 32V3, no driver transformer, and VR tube 
regulated screen voltage.

I guess a lot of the sound is in the operators voice, the best stock audio I 
ever heard was an old sure 55s plugged into a stock 32V.
If I did that, I sound nasty, but the guy (don't remember who) sounded 


----- Original Message ----- 
From: "Larry Szendrei" <ne1s at securespeed.us>
To: <amradio at mailman.qth.net>
Sent: Tuesday, September 15, 2009 12:18 PM
Subject: [AMRadio] Ham mods (was Re:SP600 Question)]

> Concerning the discussion of audio modifications to commercially designed
> amateur AM transmitters:
> A lot of these rigs from the 1950s (Viking I, Viking II, Valiant, DX-100)
> did, in fact have pretty nasty audio in their stock state, and there are
> good reasons to go in and engineer improvements in that department - and
> there are many "low-hanging fruit."
> Granted, modifications made by hams will cover the spectrum from
> worse-than-stock to an "extreme make-over" in the positive direction. So
> will their physical implementation.
> (From what I've heard and had experience with, the Collins 32V-* series,
> and the Johnson Viking Ranger, are among the best-sounding in stock form
> of this generation of gear.)
> Myself, I don't like to sound raspy, distorted, or overly restricted, so
> I've more-or less had my way with these rigs to varying degrees here at
> ARS NE1S. Then again, I don't own any museum pieces, I got all of them for
> nothing or close to it, and could give a rats behind about any resale
> value. I do make sure any mods I do are neatly implemented and not ugly
> hack jobs, simply because that's the way I like to do things. They are my
> toys to enjoy, and enjoy them I do. There are two reasons I don't own any
> super-clean gear of this type: (1) the pricetag, and (2) I'd be reluctant
> to do what I consider necessary modifications to it. I'll agree with what
> Jim W5JO said - this type of experimentation is ham radio at its best, and
> I've learned a lot in the process.
> 73,
> -Larry/NE1S

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