> 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.
Using a 572B in an 811-A socket is hardly a test.
The 572B is rated for significantly higher plate voltage and
plate dissipation than the 811A. Even the worst of the "572B"
tubes should perform satisfactorily when replacing an 811A.
73,
... Joe, W4TV
> -----Original Message-----
> From: amps-bounces@contesting.com
> [mailto:amps-bounces@contesting.com] On Behalf Of Dave Harmon
> Sent: Friday, March 13, 2009 3:25 PM
> To: amps@contesting.com
> 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@contesting.com
> [mailto:amps-bounces@contesting.com] On Behalf Of Glen Zook
> Sent: Friday, March 13, 2009 12:55 PM
> To: amps@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@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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