I've always like the LOOKS of the 30S-1.
73,
Gary K9GS
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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/
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----- Original Message -----
From: "Gary Smith" <wa6fgi@sbcglobal.net>
To: <amps@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 superseded it by a long shot.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@kingwoodcable.com>
> To: "Amp Reflector" <amps@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
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
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