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Got the PS working and it was mostly pilot error.? The previous owner had replaced the Jones connector on the DC cord with Molex connectors for whatever reason and had put PowerPoles on the Jones

Dwight, You didn’t give info on who is selling, seller’s contact info, and price. When you have a moment please post that information. 73, Bill KJ5BNE ++++++++++++++++ Bill Blodgett Arlington,

dwight_talley <dwight_talley@...> added the photo album Drake R-4C T-4XC and MS-4 Powersupply ( /g/DRAKE-RADIO/album?id=292944 ) : For sale are a complete set of Drake

Hi Mike. So looking at the transmit power out of 18 watts vs the spec of 25 watts the rig is only slightly down in transmit power. Assuming the small drop is all drive from the VCO board, this is

Spent all day on this project, Here what I have accomplished… replaced the FET with a second one— I’m getting fairly good at taking the 2m rec/vco boards apart. No joy…. I decided that the

Hi Bill, "Bill NZ0T" <nz0tham@...> wrote: This is a puzzler. Check with a frequency counter or spectrum analyzer to see if your power is coming out where it is supposed to be. If it is, you may

A lot of progress today. Got the knobs and front panel all cleaned up and put back on.? Gonna need to find some of the blue filter plastic for the VFO and meter lights but no hurry on that.? I took

Just remembered - it's DigiKey ...

Hi Mike. So lets consider the RF Amp as working at the moment and something perhaps in the mixer is the issue. If not already done, check the DC voltages on Q813 and the LO injection levels. The

Paul…. I took the MFE521 out of the deaf receiver and put in one from the part pig UV3. No joy! Still deaf.. Now, the voltages on the four pins of the 521 are right dead on the nose. Now that being

I forget which one - but one of the parts suppliers has always given free shipping to those who pay via check or MO - no minimum order.

Hi Mike. RF Parts lists the MFE521 in their Misc parts listing. Price $5.95 ea. BUT, minimum order is $25.00 from them. Checked Mouser and no listing whatsoever. I agree with you on the Asian clone

Hi, Mark…. As Jim, NU0C mentioned, I do have the power supply/osc board for the TR7 along with the extension boards for the TOP cards. I’m working on the set for the bottom cards. This is not the

Everyone, the struggle continues. I have reduced the stack of non working UV3s down to three. One of the UV3s is a two meter only model. It’s kinda deaf in that it takes 10uV of signal for it to

Hi Mark, "atlasstuff" <g4fph@...> wrote: Mike is a member of this group. I am sure he will respond. I recall mailing the owner a few years ago and he was not willing to ship to the UK because

Everyone! I have the last two offset boards for the UV3 repaired. Basically, the 4081 ICs were bad. On one board, all three had a bad section that turned on the wrong offset. Frankly, I’m still not

If you can’t find them all, let me know what you are missing and I’ll check my extensive stock of TTL and CMOS IC’s. I have thousands if IC’s, not all the numbers, of course, but some that are

Clint, Thanks for your vote of confidence! Right now I am much less confident than you are on this topic. Just ordered some replacement semiconductors and waiting for these to arrive. I have checked

Hi Rick, You’ll get it going. At the end of it, you’ll know the RV-75 really well! 73, Clint, VE3CMQ Sent: Thursday, 8 February 2024 11:05 To: [email protected] Subject: Re: [DRAKE-RADIO] RV75

Thanks all for the tips, I got all the knobs off last night for cleaning.? Also gently pried the clear horizontal plastic covering the meter out of it's grooves because it is dirty on the inside.?