Randy Karen Long wrote:
Ed,
I have a set built out of the May 1973 QST... With few modifications they
work as well or better than the Wacoms or Cellwaves I have used. Am
currently sourcing some 4 type L copper now to build more. If you have mort
time than money, you can come up with
I had a set of home brew copper pipe duplexers that used regular steel
threaded rod for the plunger rods. After the frustration of not being able
to keep them tuned, I took them apart and put two nuts above the plunger
and two nuts below the plunger on the threaded rod. I tightened these
I had a set of copper copper pipe duplexers for 220 years ago. I thinnk they were 4 inch in diameter. I had a stability problem due to temperature changes. They required a "winter tune" and "summer tune" twice a year. I used them for several years and the taught me why I neede to find a good
here in the Colorado
area have more of an issue. I dunno J BTW current relative humidity is 14%.
Randy, W0AVV
From: Joe
[mailto:[EMAIL PROTECTED]
Sent: Thursday, August 05, 2004
6:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Hi
All, Help with Building
]
Sent: Wednesday, August 04, 2004 9:29 AM
To: mrhquin; Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Hi All, Help with Building Cavity
UHF or VHF ?? what band .. need that info to help you out
Rick
On 4 Aug 2004 at 6:28, mrhquin wrote:
Hi My friends and I are building
I have a question to the group about cavities as well..
In an old Antenna Hand Book, hardback, I saw where one can build theit own
cavaties. Has anyone done that in this group and if so results please.
Ed
mrhquin wrote:
Hi My friends and I are building a repeater.
The task of building
Ed,
I have a set built out of the May 1973 QST... With few modifications they
work as well or better than the Wacoms or Cellwaves I have used. Am
currently sourcing some 4 type L copper now to build more. If you have mort
time than money, you can come up with duplexers that may not always be the
When you say filters and refer to loop length I assume your referring to
cavity filters, BpBr, Bp, Notch or the like. There is a whole lot more to a
cavity design/performance than just loop length and shape, a whole lot
more!! If you plan to build enough cavities for a repeater duplexer your an
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