[Amps] Fw: {Collins} 30S-1

[Gary K9GS]

I've always like the LOOKS of the 30S-1.


73,

Gary K9GS
++++++++++++++++++++++++++++++++++++++++++++++++
K9GS
Gary Schwartz           email: k9gs (at) arrl.net
Check out K9NS on the web: http://www.k9ns.com
Society of Midwest Contesters (SMC)     http://www.w9smc.com/
GMDXA http://www.eng.mu.edu/gmdxa/
++++++++++++++++++++++++++++++++++++++++++++++++

----- Original Message ----- 
From: "Gary Smith" <wa6fgi at sbcglobal.net>
To: <amps at contesting.com>
Sent: Wednesday, October 21, 2009 1:42 PM
Subject: [Amps] Fw: {Collins} 30S-1


>
> ----- Original Message ----- 
> From: Gary Smith
> To: Carl
> Sent: Wednesday, October 21, 2009 11:05 AM
> Subject: Re: [Amps] {Collins} 30S-1
>
>
> I had one that was on loan to me for a couple of years. after dealing with 
> the known relay problems and getting them somewhat cured, all was well 
> until one day in the middle of a QSO my signal fell off dramatically.
> Seems that both fuses on the control board had gone south, which led to a 
> guess ht the tube's grid had shorted out against the interior of the tube. 
> As I did not have a spare to test with, I returned it to its owner who 
> told me that was why he had loaned it to me.
> "Too many ongoing hassles," he said.  All would probably agree that it was 
> a good amp for the Po (continuous until hell freezes over, etc) in its 
> day, but newer and more modern amp designs and tube developments have 
> superseded it by a long shot.
> Gary...wa6fgi
>  ----- Original Message ----- 
>  From: Carl
>  To: kingwood ; Amp Reflector
>  Sent: Tuesday, October 20, 2009 5:07 PM
>  Subject: Re: [Amps] {Collins} 30S-1
>
>
>  Which are all reasons why I have never had any interest in owning one.
>
>  My experience is limited to repairing maybe 5 and converting 6 to 6M
>  monobanders where they have a better chance of reliability.
>
>  Carl
>  KM1H
>
>
>  ----- Original Message ----- 
>  From: "kingwood" <k5jv at kingwoodcable.com>
>  To: "Amp Reflector" <amps at contesting.com>
>  Sent: Tuesday, October 20, 2009 6:07 PM
>  Subject: [Amps] {Collins} 30S-1
>
>
>  > Greetings to all,
>  >
>  >        There is some misinformation  being passed out here about these
>  > tubes.  There are two common 4CX1,500 tube types, the "A", and the "B".
>  > The
>  > "A" tube has a 25 watt grid dissipation rating but will not work in the
>  > 30S-1 without changing the tube socket.  The "B" tube has a 1 (one) 
> watt
>  > grid dissipation and will directly replace a 4CX1,000 in a 30S-1 amp. 
> As
>  > I
>  > said in an earlier post, this is a X 10 increase in grid dissipation 
> over
>  > a
>  > 4CX1,000.
>  > .
>  >        It is important to know, and understand, that the band switch in
>  > the
>  > 30S-1 was never intended to see more than about 600 watts of RF.  This 
> amp
>  > was designed at a point in time when US Amateurs were only allowed to 
> run
>  > 1,000 watts AVERAGE INPUT power, not OUTPUT.  This band switch is made 
> on
>  > a
>  > thin sheet of G10 fiberglass with contact points riveted on.  My point 
> is,
>  > be careful how you handle this switch, both power applied and 
> switching.
>  > I
>  > had to pay $500 for the last one I changed out for an RTTY operator. 
> In
>  > my
>  > opinion, the 30S-1 should never be operated on any continuous mode. 
> High
>  > speed CW is also very hard on it.
>  >
>  >        Despite the other numerous faults with this amp, it is still 
> around
>  > and quite a topic of conversation.  Ask yourself why has it not 
> increased
>  > in
>  > value comparable to other similar amps.  If you ever had to maintain a
>  > "fleet" of these amps, as with the MARS program, you will understand 
> why.
>  >
>  >        I have a 30S-1 with grid drop-out mod, fused step-start,  and
>  > 4CX-1,500 with increased screen voltage.  With these mods, it runs
>  > reliably
>  > in SSB but I still cringe every time I turn it on -- so many more bad
>  > things, than good things,  can happen every time it is turned on.
>  >
>  > 73 de Lon, K5JV
>  >
>  > 1110 Golden Bear Ln.
>  > Kingwood, TX 77339
>  >
>  > 281-358-4207
>  > 281-358-4234 FAX
>  > 281-795-1335 CELL
>  >
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