Well, I started working on the circuit using a 9.6 MHz crystal (I have a bag of them) for the VXO, hoping that that will be a good frequency to mix in order to get 5 to 5.5 MHz. Using a 10uH inductor
Thanks Steve but that's the code that I was talking about. I already have AD7C's code modified to tune 5 to 5.5 MHz, I just need it to shift frequency slightly with a DC voltage for RIT. AD7C , himse
If you get desperate, consider a pair of pulls from a Motorola FM radio as a substitute. I was able to get a pair to hold bias current steady and work nicely in a Omni D (MRF458). Generally free to b
Ken, have you measured the voltage on each xistor and on the zener diode? Does it look normal? Also, does it look like there's voltage across the selected (by which band is selected on the front pane
Good to hear that you fixed it Ken. That's always a good feeling - finding the problem and fixing it cheaply. I wonder if you'll really need to buy parts. I think these things are usually reliable. I
Paul, what do you think of Synco Super Lube? It says it's synthetic and contains Teflon and you can get it at Ace Hardware and many car parts stores. I've used it on four PTO's so far.
While you're waiting for the proper tool, you can take one of those telescopic antennas off an old portable radio and break off the correct diameter tube, stick it into the business end of the plug,
I picked up a 546 Omni D, series B at Xenia that the seller said worked but had a stuck PTO so I figured it might be an easy fix and maybe something I could sell to a new ham who wants a starter rig
Bob, the PA board part number is HLB3050 and the xistor is marked "M29U01" (those lousy Motorola parts markings). Since there's only one final transistor per radio in the Maxtrac, I needed two power
Alan, I'd be happy to look at your Corsair II but I'm all the way over in Michigan. It sounds like the first thing should be to reseat all ths connectors using deoxit. I would think that would be a g
Josh, direct conversion receivers such as the one in the C21 are inherently susceptible to AC hum from the power supply since all the system gain comes from the AF stages. The 23 VDC is only used in
Tom, find out if theres asignal missing when it quits i.e. PTO or something. If it affects receive andtransmit on all bands, I would say its not a pre-mix oscillator for one band,but something common
Tom, find out if theres a signal missing when it quits i.e. PTO or something. If it affects receive and transmit on all bands, I would say its not a pre-mix oscillator for one band,but something comm
I'd like to take a look at one of those omni 6 logic boards that Ten Tec has deemed "unrepairable" if someone would be willing to send one to me. I have a working radio to compare it to and a source
Doc, I'd be interested in looking at your two faulty boards if you would let me. I can pay for the shipping both ways. -- Curt: I used to have three of those fabulous 564 Omni radios....only to l
I thought I'd pass this along: My Omni VI wouldn't change frequency so I subbed the RIT encoder and confirmed a bad encoder. I found one on Ebay that not only was close but better than stock (it's go
Like I was saying, it's almost exactly the same part number. The stock part is Bourns ENA1J-B28-L00128 and the one on Ebay is ENS1J-B28-R00128. If you check the Bourns EN series data sheet, you'll fi