[Milsurplus] Mods and hacking of NOS gear

[ersmar at comcast.net]

Perry:

     Not much else to comment on here except have you tried a series 
resistor-capacitor key-click filter across the key?  I had one of these 
things on my Novice rig in the 60s (didn't want a second Pink Slip from 
Uncle Charlie.)  Just a simple 100k resistor and, I think, 0.1 uF paper cap 
in series across key terminals.  Main advantages are no mods needed to the 
rig/key and easy to play around with component values.  Also, possibly 
something that RO's from the Ham population in WWII might have figgered out 
for themselves.

73 de
Gene Smar  AD3F


----- Original Message ----- 
From: <w8au at sssnet.com>
To: <Milsurplus at mailman.qth.net>
Sent: Thursday, June 22, 2006 4:05 PM
Subject: Re: [Milsurplus] Mods and hacking of NOS gear


> At 01:53 PM 6/22/06, Falls, Jim wrote:
>>If it's NOS, I leave it alone. I want to align it and optimize it per 
>>spec. I like to work w/the gear as it was, even if that means marginal 
>>performance. It makes me appreciate all the more what the ops had to 
>>contend with back then. Not so sensitive or selective? OK by me. Not 
>>everything was a "Ferrari".
>
> Have mixed emotions about some WW2 gear, and it pertains to CW.
> Our TDE aboard USS LST325 works wonderfully, but the keying is
> very hard on "make" and has sidebands out much further than
> allowed by todays regs. (Key Klix)
>
> Viewing the circuitry shows that keying is basically cathode style
> on each stage including keying the filament xfmr center-tap of the
> final (803) amp.  No L/C conditioning is added.
>
> I tend to lean to keeping it authentic despite it's shortcomings, but this 
> probably causes grief to those listening nearby.
>
> Of course our TCS (and most everyone else's TCS) has hard keying, but at 
> 40 watts output, it's probably not as objectionable..
>
> Consensus?
>
> Perry   w8au   (WW2LST)
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