[AMPS] Teflon source?

[Roger Rehr]

Anyone know where I can get a 2 inch long, 0.3 to 0.5 inch diameter rod
of teflon to make the choke cacoon for a modified 6155 amp for 432?

I am having trouble getting the big distributors to sell me a small
quantity.


73 from
Roger Rehr  W3SZ ex-AA3QK ex-WA3JYM
mailto:rrehr@epix.net        FN20ah
http://www.epix.net/~rrehr
2 Merrymount Road, Reading, PA  19609
610.670.8687

> -----Original Message-----
> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
> Behalf Of Roger Rehr
> Sent: Sunday, August 30, 1998 9:50 AM
> To: amps@contesting.com; vhf@w6yx.stanford.edu; 'VHF Reflector'
> Cc: 'Roger Rehr'
> Subject: [AMPS] 6154/6155 Question
>
>
>
> I recently got unmodified 6154 and 6155 amps, and have been
> modifying them to work on 2m and 432 respectively.
>
> I have completed the mods on the 6154 and it works great on 2m.
>
> Last evening I started the non-cavity part of the mods on the 6155.
> Of the two amps, the 6155 appears more "untouched", whereas the 6154
> had obviously been worked on before (missing screws here and
> there, etc).
> As I went to remove the control grid/thermal control module
> (bias supply)
> in the 6155, I found that it has only one large board; the 6154 has a
> smaller board mounted on top of the larger board that contains a slide
> switch with the labels "S1",  "Normal", and "Set PA Current".
>  The board
> is labeled: "NSN 5998-01-298-2106 AM-6154/GRT-21 & AM-6155/GRT-22".
> This small board also contains 4 resistors, a 6 pin IC, a transistor,
> and a capacitor.  I do not see it on my schematics.  The 6154
> is working
> fine with this board.  There is no evidence that this board
> was ever in the
> 6155.  In the 6154 it attaches to pin 13 of "P1" of this
> assembly and to a
> point at or near E1 on the underside of the main board.
> These locations
> look untouched on the 6155, not as though something was removed.
>
> I guess/hope the board was a upgrade that is not necessary.
> I don't know
> its purpose, though it clearly relates somehow to setting the
> bias level.
> The fact that the more "mint" amp didn't have the board makes
> me wonder
> if on one of its trips to the repair shop the 6154 had the
> upgrade added.
>
> Any thoughts would be appreciated so I know what to expect when I turn
> the amp on, and if I need to do some scrounging/building...
>
> P.S. a second question: can I exchange the RF modules from
> the two units
> to verify operation of all the control circuitry before I
> complete the 432
> mods, etc??
>
>
> 73 from
> Roger Rehr  W3SZ ex-AA3QK ex-WA3JYM
> mailto:rrehr@epix.net        FN20ah
> http://www.epix.net/~rrehr
> 2 Merrymount Road, Reading, PA  19609
> 610.670.8687
>
>
>
> --
> FAQ on WWW:               http://www.contesting.com/ampfaq.html
> Submissions:              amps@contesting.com
> Administrative requests:  amps-REQUEST@contesting.com
> Problems:                 owner-amps@contesting.com
> Search:                   http://www.contesting.com/km9p/search.htm
>
>



--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm