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Ok, now we are getting into the deep and of the pool!!!! I'll do my best to keep my head above the water. I am measuring the frequency with my freq counter. It's an HP5335A. It does a great job but I believe that based on your information above it is likely that it is not sensitive enough...
There are still issues here but here is what I did. I restored the clarifier back to stock. I have a second radio so I comapred it to that radio AND the schematic to be sure that the resistors, diodes and the clarifier wires are correct. VR9 now works to adjust the transmit frequency. I also...
Hi Everyone,
I know that I have a few posts on here about various radios. One of them has parts ordered and one of them I am in the step by step process with it. Today I have a Cobra 139XLR that had some PLL mods (extra channels) as well as a strange clarifier mod. I removed the channel and...
Very fair question!!! I am sure though.
Pin 2 - 3.24vdc
Pin 3 - 3.44vdc
Pin 5 - 6.14vdc
Pin 6 - 7.9vdc
All of the measurements were taken in AM and TX.
Attached is a pic of the bottom of the board with my measurements and notes. So sorry if it is a little confusing.
Ok, So I replaed the 612 with a known good one. It did not fix the issue. Does anyone think that something is loading the circuit down and that is why the voltage going into pin 3 of IC6 is only 3.7vdc? Are there any other thoughts as to why I do not get 10.695 at TP5 when I do have it at...
Really? WOW!!! That is good feedback!! The only access I have right now is the one on the 2950. I can do a swap as a test. Where did you get your replacements and feel good about the supplier?
Thanks!!
Good Afternoon Men,
So I have entered the deep end of the pool with this radio. I am navigating way beyond my knowlege but I somehow think I'm close. I have this Texas Star 696 base that has the EPT069610Z board in it. For a schematic I am using the Galaxy DX-959 from 1997 (attached) and it...
Hi Gang,
I have searched WWDX and cannot seem to find the answer to this. I have on the bench a DX 400V with all 4 button bulbs blown. I will say that in my opinion its due to the amp being powered with too much vdc but operators will do what they want. I've experienced that LED's do not last...
Can you elaborate on the AT models if you have any experience with them? Like, the 5555 Plus vs the 5555N2? Or the Q6 vs the Q6 Pro? What really changed? On the Q5 Plus I like the extra digit that shows the 10th Hz on the frequency display vs the 6 digit display on the N2. That's just a...
Ok Men,
Lets keep the responses specifically to the question in hand regarding the best receive. There are some interesting points about the "export" radios and the fact that most do not seem to have great receivers especially in comparison to radios built 40-50 years ago. It's also an...
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