Regarding the time out problem in the GE Mastr II, check the repeater
control board, 19D417385 G2
and add a .01 capacitor from pin 5 of U-1 and U-2 (555 timers) to ground.
These were ommitted by GE
for some reason, and if missing can make these timers unstable.
Quoting the Sams 555 timer applications sourcebook, Page 18:
"If the control pin (Pin 5) is not used, it is recommended
that it be bypassed to ground with a .01 mfd capacitor to prevent any noise
from altering the calculated pulse width"
73 John VE3AMZ Waterloo, Ontario.
----- Original Message -----
From: "John J. Riddell" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Thursday, July 29, 2004 10:15 PM
Subject: Re: [Repeater-Builder] GE Mastr II/IDA Controller - Selective COR?
| We had a similar problem here about 20 years ago on VE3RSO....a fully
| commercial set-up
| Mastr 11 repeater and as I recall it was a 555 timer that needed a .01 Mfd
| bypass installed on one of the
| leads....I'll try to dig thru my notes to see if it was documented.
| It's on one of the boards in the control shelf.
|
| John VE3AMZ
|
|
| ----- Original Message -----
| From: "derek_mcintyre" <[EMAIL PROTECTED]>
| To: <Repeater-Builder@yahoogroups.com>
| Sent: Thursday, July 29, 2004 9:54 PM
| Subject: [Repeater-Builder] GE Mastr II/IDA Controller - Selective COR?
|
|
| | I am using a full blown GE Mastr II repeater station with an IDA
| | control board (I suppose this is a factory installation). It has a
| | speaker on the front, with a volume control and a few selector
| | switches, and jumpers on the board which select time out, hang time,
| | etc. I have a CW identifier interfaced as well.
| |
| | I am not using any additional controller with this station and am
| | having a strange problem. Quite often, the repeater seems to "drop"
| | users. It's not a time-out timer problem. Users will be talking.
| | One will un-key, and the next one will pick it up, but the repeater
| | will NOT repeat! When he finally unkeys, the next user will pick it
| | up and it will work just fine. It's not one user in particular.
| | There is no time frame associated with it. It's like the unit has
| | selective COS. It drops whoever it wants to.
| |
| | Is there anything that you can think of that would make this happen?
| | I have changed hang times all over the place, even took the time out
| | timer to 10 minute mode. In the manual there is a "master" timer but
| | I don't think this is a timing issue. If I can't get this
| | straightened out, I'll probably wind up having to put an external
| | controller on the thing. Any suggestions?
| |
| | Thanks
| | KC4FWC
| |
| |
| |
| |
| |
| |
| |
| | Yahoo! Groups Links
| |
| |
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| Yahoo! Groups Links
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