Try the yellow pages under plastics. Here in Portland, Or I have been
getting Teflon
from a company called Multi-craft .
Art
KB7WW
Roger Rehr wrote:
> 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
> >
> >
> >
> > --
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> >
> >
>
> --
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