I'm assuming you mean preselector - preamp.
At that frequency, they were usually made with a bipolar transistor,
unless it was custom made; then it could be a GaAs device. It is a
MRF-901 (or equivalent) if it is bipolar. Many times only 901
appeared on the device, if it wasn't ever changed.
At 03:49 AM 12/28/07, you wrote:
Anyone know the device number of the gaasfet (or whatever type it is)
in the P-145 model?
Inherited one with -12 db gain. Looks easy enough to fix.
Thanks,
Dwayne Kincaid
WD8OYG
I fixed one years ago with a Siliconix U-310, but I have no doubt that there
are
I have a GLB Model P-147.49 that was custom made for me years ago. It
use an MRF901 device.
73, Joe, K1ike
ldgelectronics wrote:
Anyone know the device number of the gaasfet (or whatever type it is)
in the P-145 model?
Inherited one with -12 db gain. Looks easy enough to fix.
Thanks,
The GLB worked very well on my FM-76 (aka 13-509) but it only gave about
8dB gain overall to the receiver. Most of the gain was lost in the helical
coil front end, but it worked wonders on marginal receivers. It tighten up
the receiver and gave the impression of more added gain than 8dB. I
I move them a little at a time, don't try to make big changes or you will
not be able to get a signal through it. If you want to, you can take the
cover off and inject a signal into each stage. Work from the output towards
the antenna connection. When you are able to get a signal from input
At 8/2/2005 06:55 PM, you wrote:
Joe wrote:
I had an FM76 convered to a 220Mhz repeater and used a GLB preselector
in front of the receiver. It helped a lot. Unfortunately, the GLB is no
longer available.
Are you sure?
For Years I used the GLB Preamp/Preselector on thefront end of my
Midland 509 220Mhz repeater
the preamp stage is an MRF-901
I think a Gasfet Preamp will create to much noise
Bob Dengler wrote:
At 8/2/2005 06:55 PM, you wrote:
Joe wrote:
I had an FM76 convered
Bob Dengler wrote:
At 8/2/2005 06:55 PM, you wrote:
Joe wrote:
I had an FM76 convered to a 220Mhz repeater and used a GLB preselector
in front of the receiver. It helped a lot. Unfortunately, the GLB is no
longer available.
Are you
I think you are confused Neal, the GaAs FET option was available on
GLB P/P 200 MHz and above. I did have them build me one for 2 meters,
but I didn't see much difference in the performance over the MRF-901 on
2 meters; certainly not worth the added cost.
Kevin
Neal Newman wrote:
Joe wrote:
I had an FM76 convered to a 220Mhz repeater and used a GLB preselector in
front of the receiver. It helped a lot. Unfortunately, the GLB is no longer
available.
Are you sure?
http://www.aria-glb.com/products/reset_frames.htm?/products/preselector.htm
Kevin
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