On Sun, 22 Jul 2007 15:26:47 -0700, moparhoLICK and chukkeesukkee are
lovers wrote:

|On Jul 22, 5:30 pm, james wrote:
| On Sun, 22 Jul 2007 05:55:32 -0700, Jay in the Mojave
|
|
|
|
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| wrote:
| +++james wrote:
| +++ On Sat, 21 Jul 2007 08:28:58 -0700, Jay in the Mojave
| +++ wrote:
| +++
| +++
| ++++++Hello All:
| ++++++
| ++++++Here is a neat old speech processor that we all use to use on our AM/SSB
| ++++++radios in the 80's.
| ++++++
| ++++++This speech processor really worked well inreasing the average speech
| ++++++power the transmitter put out. It allowed us to cut thru the skip when
| ++++++trying to talk to the locals. And when underhanded transmissions where
| ++++++sent it was turned off, so not all would hear ya.
| ++++++
| ++++++http://cgi.ebay.com/DAIWA-SPEECH-PRO...temZ1801413908...
| ++++++
| ++++++Jay in the Mojave
| +++
| +++ **************
| +++
| +++ The best processor that I have ever heard was the ones made by
| +++ Sherwood Engineering that worked with the Drake TR4 or with the T4X.
| +++ It was an RF clipper with an 8 pole crystal filter following. That
| +++ made a fantastic difference. Far better than any audio clipping or
| +++ compression would do.
| +++
| +++ james
| +++
| +++Hello James:
| +++
| +++Yeah I have heard of the Sherwood, and other processors. They did work
| +++great. I don't know all the poop about them but I know when my Yaesu 902
| +++was driving my amp the Gamma Matches would ack over on the Moonraker
| +++beam, with the Diawa 440. The stock processor worked also, but not like
| +++the Diawa 440.
| +++
| +++Another reason for dumping the gamma matches
| +++
| +++Jay in the Mojave
|
| *************
|
| It is not the fault of the Gamma Match design. The design is a very
| rock solid design. How various manufacturers implement the design and
| the materials used is what becomes the major issue. It is still by
| far one of the better matches to take an unbalanced feedline to a
| balanced antenna system. The dielectric for the capacitor should be
| teflon in high voltage, ie high power, situations. Often manufacturers
| skimp a bit and use nylon. Nylon deteriates with time and exposure to
| UV light. Cracks propogate through the capacitor and you also get
| dielctric breakdown. Teflon is a better material. I not sure but I
| beleive that UV stabilized Delrin may also work adequately. Also any
| other plastic that is UV stabilized may work well for medium and low
| power applications.
|
| james- Hide quoted text -
|
| - Show quoted text -
|
|Of course, you keyclowns fail to state that if one runs 4 watts CB
|power the gamma match insulator could be made out of about anything
|and still wouldn't fail. Guess that would be accepting the fact that
|power on the CB band of a level to cause gamma arcing is not legal.
|----------------------------

I would not go that far. One could construct a gamma match that with
enough time and deteriation would fail at power levels of 4 to 20 W.

Still for most contruction of gamma matches, they will not fail at 4
W.

james