I use Bomar these days for crystals for the ham bands. I have had good luck
installing them myself and re-adjusting them in a year or so back to the right
frequency.
I recently worked on a GE Delta radio that had been crystaled using CUMEX and
found the receive crystal had drifted over 2 kHz in the several years it had
been in service. It was so far off it would not adust back to the original
frequency until I ran the adjustment slug on down through the coil form and
added another slug on top of it. Now with two slugs in the coil, it wound up
back on frequency. I don't know if it will continue to drift, or if it has
settled down, but for now it is working just fine.
I used Marden for crystals until I got into a beef with them on a receive
frequency and gave up after sending an operating crystal back to them a couple
of times and telling them what frequency it operated on, and them sending it
back and telling me what frequency they thought it operated on.
73 - Jim W5ZIT
[EMAIL PROTECTED] wrote:
Hi All
Looking for information on who makes crystals for channel elements.
Micor's and Mitrek
Yes, I know that International makes them but the price is high.
I have had good luck putting crystals in old channel elements and changing the
caps as necessary
to achieve reasonable stability. Used to use CUMEX in El Paso but they seem to
be gone
Ralph, W7HSG
From: Kris Kirby <[EMAIL PROTECTED]>
To: [email protected]
Subject: Re: [Repeater-Builder] Re: UHF Radio recommendations ??
Date: Sat, 3 Nov 2007 23:32:48 +0000
On Fri, 2 Nov 2007, wb6ymh wrote:
> The 30 watt version is a better radio for repeater service since all
> solid state transmitters are very inefficient when run below their
> designed output. A 30 watt Mitrek running at 15 watts will probably
> last forever, but a 50 watt Mitrek running at 20 watts gets way too
> hot for my tastes. It would probably be ok with a fan, but I really
> didn't want a fan for numerous reasons.
Well the radio is only specified to run a certain percentage in transmit
anyway, but at this point, you can probably get a dump-truck load of
Mitreks for the asking. That will give you enough radios to keep the
repeater running until Doomsday. All you need is a few channel elements,
and you can skip using lightning protection altogether.
If a Mitrek falls in the forest, does it make a noise?
--
Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
But remember, with no superpowers comes no responsibility.
--rly
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