Hi Mark, Have you checked the files section of this group? 73....Eric VK2VE. _____ From: FM900@yahoogroups.com [mailto:FM900@yahoogroups.com] On Behalf Of Mark...
... Hi Eric, I did, some time ago and there was not what I was after, but since checking again after your email I found a link to a site that contained what I...
... Hi Eric, I did, some time ago and there was not what I was after, but since checking again after your email I found a link to a site that contained what I...
Sorry Mark I don't have one for you, however your CTCSS enquiry has prompted me on a similar question. My version of software in the EPROM is AFI900, I like...
Greg Hilder
geckoraptar@...
Jul 11, 2008 2:28 am
6488
Hi Greg, There are some designs on the Web for home brew CTCSS encoders that fit in the same option slot as the Philips CTCSS encode module. At least one of...
Look in the files section of this group. You will find my design of a fully compatible encoder for the FM900. It generates all tones and is sine wave. If...
Hi, I have never posted before, just lurked here reading. Anyway I got myself a W1 band FM92 last month. I programmed an eprom and plugged it in. I then...
Since posting my method for repairing VCOs in the files section some years ago, I have been experimenting with a new method of repair which has similarities to...
Hey Guys Thanks for letting me in, I have a couple of these old tanks, an FM91 remote (that actually is still ok) and an FM900 Local with a crook VCO (deaf). I...
... Thanks Ron. I have one FM900 here that's not too bad, however it could be inproved and this method is far more to my liking. Let you know how it goes. ...
Hi Ron, Some time ago, after becoming rather frustrated at not being able to remove a VCO without a proper desoldering iron, I tried a similar method to the...
Hi Anthony, If the receiver is deaf then it's more likely to be a fault in the receiver front end module, or the VCO buffer module. Unfortunately these module...
I have an FM900 (92) that has a nasty hum on transmit. It is somewhat higher in frequency that 50h and tends to vary with movement of the RG58 antenna cable. ...
Mark Agree with what you say about the deaf radio in this case not being the VCO. Also agree with your other comments. I was very interested about your...
Hi Kevin, A few things to look for: Low power supply voltage. A low supply voltage (i.e. 10-12 volts instead of 13.8 volts) can produce hum on transmit. Look...
Hi Ron, There was some discussion in this group about the solder some time ago. I'm not sure if the absorption is something that happens over time, or if the...
Mark A bit of lateral think may be required. Tried this but have not got anywhere as yet. You mention the use a cooper braid. Had considered this. In fact...
Hi ppl Running a heat activated glue/mastic around the edge of the ceramic substrate and the metal housing after the vco has been heated to allow the solder in...
Hi Ron, One approach used in a government service was to inject the VCO module completely full of silastic. While it improved reliability for a while, it made...
Thanks Ron, For those who want another method. I too have done a few dozen this way & although it is hard to know whether they re-offended, to the best of my ...
G'day Mark Thanks mate I have the FM91, which is fine and the FM900, which has the deaf problem, it tx's fine, so maybe I will have to pull it apart when I get...
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