Metal Oxide Varistor. An overlaod and transient protection device. Andy G4JNT What's an 'MOV'? See info in www.geindustrial.com/cwc/library?famid=37 73 de Federico EA2HB
I reckon the use of those 'MOV's in the Decca is a bit belt-and-braces anyway because both output ports are diode clamped to positive and negative rails. Maybe they are faster than the diodes and pro
In a message dated 5/30/02 11:30:54 PM GMT Daylight Time, [email protected] writes: Mike, I collected 4 spare IRF250 power Mosfets for the Decca TX from the Crawley Club at the meeting last night
Mike, I collected 4 spare IRF250 power Mosfets for the Decca TX from the Crawley Club at the meeting last night and will stick them in the post to you soonest. I was unable however to find among the
Thank you to all those who have commented on my Decca Tx unit failure. As the Tx has three units, and two are still working, I was able to compare good with bad. This resulted in finding two faulty t
The dead Tx unit still works but not very well. A component across one of the transistors burnt out. I have a diagram but do not recognise the symbol (perhaps a temperature variable resistor?). It is
I suppose that you could connect at the PSU output a zener diode to ground, after a fuse, to protect your Decca Tx in the future Maybe a Zener, Thyristor (etc) and fuse to form a crowbar cct. David
Mike These are 'varistors' or voltage dependant resistors which are used as transient suppressors. In my 'chinese copy' of the Decca bridge PA, I used a 200 volt, 8 Kilo-amp, 85 Joule device availabl
It could be a GE transorb which was a kind of a voltage limiter that was made by GE about 25 years ago -- it either is a MOV (Metal Oxide Varistor) or acts like one. I do know that they were red and
Oh, yes, the highly protected commercial (ex-telecom) PSU oscillated and produced over 100V. I suppose that you could connect at the PSU output a zener diode to ground, after a fuse, to protect your
It would be helpful if you could let us know _how_ your PSU problem destroyed that Decca unit. Did your PSU provide a voltage higher than 67 volts DC? 73 André Oh, yes, the highly protected commercia
I have at last fixed the PSU problem that killed one unit of my Decca Tx units a few months ago. Hello Mike, It would be helpful if you could let us know _how_ your PSU problem destroyed that Decca
I have at last fixed the PSU problem that killed one unit of my Decca Tx units a few months ago. I am at present running about 600W RF (75mW ERP) from two units, after using 100W RF for some time. Th
