[TenTec] Century 21 audio hum

Greg S oldlongbeard at yahoo.com
Tue May 30 18:27:15 EDT 2017

I have used Sil-Glyde grease with great success. I can vouch for the fact that parts are not normally needed. But you will spend some time cleaning that old, dried farm implement lubricant they used ;-)
Greg, KC8HXO
On Tue, 5/30/17, Howie WA3MCK <wa3mck at gmail.com> wrote:

 Subject: Re: [TenTec] Century 21 audio hum
 To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>, "Josh Gibbs" <Gibbsjj at gmail.com>
 Date: Tuesday, May 30, 2017, 6:15 PM
 Tri-Flow? What is that Josh?
 I'm familiar with the flush/clean procedure. I
 have been told that 90W cup grease or bicycle
 chain lubricant is the way to
 What say you?
 On Tuesday, May 30, 2017, Josh Gibbs <gibbsjj at gmail.com>
 > Sounds like its
 time for a PTO clean and re-lube! I've been reading
 > that procedure. Seems that
 usually the PTO parts are fine and you just need
 > to clean out the old grease and get some
 fresh grease in there. Some people
 > seem
 to recommend flushing out the old grease and then putting
 > Tri-Flow in there. Would certainly
 be a lot less work!
 > I hope Ten-Tec comes back to life and
 starts selling parts again!
 > Thanks for checking that hum for me. Mine
 is definitely more than a slight
 > -Josh
 > On Tue, May 30, 2017
 at 2:54 PM, Howie WA3MCK <wa3mck at gmail.com
 > <javascript:;>> wrote:
 > > Josh,
 > >
 > > Thank
 > > for the info on the swamping
 resistor placement and installation.
 > > I have an analog C21. Bought
 it in the late 90's, had it on the air for a
 > > few years, sold it to Joe N2CX, he
 had it for 15 or 20 years, and I
 > > it back s few years ago.
 > >
 > > It's
 beat up cosmetically but works fine. Replaced the finals not
 > long
 > >
 ago... and now the PTO is starting to go - mechanically that
 > >
 > > Ok -
 just checked - yes, when I turn down the volume there is a
 > hum
 > >
 with my old 8 ohm mono headphones.
 > > I prefer to use the internal
 speaker which is fine for me and why I may
 > > have not noticed the low/level
 > >
 > > By
 the way, I emailed TenTec several months ago concerning
 > > availability of a PTO repair
 kit for the C21 analog xcvr. I received an
 > > answer a few weeks ago stating that
 they were in transition and to keep
 > > eye on their website. Nothing
 seen yet.
 > >
 > Howie WA3MCK
 > >
 > TenTec mailing list
 TenTec at contesting.com
 > http://lists.contesting.com/mailman/listinfo/tentec
 TenTec mailing list
 TenTec at contesting.com

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