[Amps] SB200 on 6m & my take

[Carl]

One even failed at 1500V, ouch! I have 4 bad Taylors here that failed 
when installed in SB-200's but RFP wouldnt honor the buyers warranties 
since they werent used right away.

They should last forever at that low voltage and are a good swap if you 
cant find original JAN tubes for any 811 amp.

Carl
KM1H


----- Original Message ----- 
From: "Dave Harmon" <k6xyz at sbcglobal.net>
To: <amps at contesting.com>
Sent: Friday, March 13, 2009 3:25 PM
Subject: Re: [Amps] SB200 on 6m & my take


> Recently I got a set of Taylor 'Select' 572B's from RFP for use in one 
> of my
> 30L-1's and I must say they have been running very well with no 
> problems
> other than the little 'tang' that sticks out the side of the base is a
> little longer than the 811-A's so a small slot needs to be filed in 
> the
> 30L-1 chassis to allow the 572B to fit in the socket.
>
> It would have been much easier to file the tang down on the tube but I
> didn't want to do anything to the tubes to make any warrantee 
> questions pop
> up.
> Good thing too as one of them was defective and RFP replaced it with 
> out
> question.
>
> Also, if using these tubes check to see that the plate is vertical 
> when
> plugged into a horizontal socket....the plate on one of my tubes is 
> tilted
> about 15 degrees.....it hasn't caused any problems and I quit holding 
> my
> breath several weeks ago but it is something to be observed and 
> replaced if
> needed.
> Other than that....I'm very pleased and operate the amp at full power 
> with
> no 'events'.
> In case anyone is interested, I routinely operate the 30L-1 at 800ma 
> and
> 1000 watts output.
> This is on the original power supply....it should be even better once 
> I get
> around to installing the YK Systems power supply board in the amp.
>
> More recently, I installed a set of the Taylor 6146B's in an old KWM-2 
> with
> the ceramic neutralizing trimmers and of course it worked just fine 
> and the
> trimmer was in good position.
> This was the first time I used a non-US mfgd 6146 in any of these rigs 
> and
> it worked well.
> Yes, I am familiar with the warnings of using these tubes with ceramic
> neutralizing trimmers but these trimmers are adjustable, not fixed
> neutralization like in some commercial applications of yesteryear 
> where the
> use of tubes not type accepted for use could cause problems.
>
> Regards
>
> Dave Harmon
> CCA 97-535
> Midwestern Collins
> K6XYZ[at]sbcglobal[dot]net
> Sperry, Ok.
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] 
> On
> Behalf Of Glen Zook
> Sent: Friday, March 13, 2009 12:55 PM
> To: amps at contesting.com; KB0NLY
> Subject: Re: [Amps] SB200 on 6m & my take
>
>
> The "Taylors" that R.F. Parts sells are Chinese.  R. F. Parts acquired 
> the
> Taylor trademark a while back.  However, the 572B tubes that Taylor 
> brands
> with the Taylor trademark are supposedly "special" runs from the 
> Chinese
> sources and supposedly are of a higher quality than the "run of the 
> mill"
> Chinese tubes.
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
> --- On Fri, 3/13/09, KB0NLY <kb0nly at mchsi.com> wrote:
>
> I tried a pair of those Chinese ones, ended up selling them off and 
> getting
> a pair of Taylors from RF Parts.  The Chinese ones were junk.  I also 
> heard
> that they aren't not made for horizontal use as in the SB-200 because 
> they
> don't have the proper internal support and will sag when they get hot.
>
>
>
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