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More on matching tubes. Burle color coded their tubes for matching purposes. So, IF you get NEW Burle tubes color coded blue you are perfect. Red and green will work but not to maximum efficiency.

Hi Clark, I have a matched pair of NOS Burle 8122 tubes (Green Dot) that are surplus to my needs if you want to pick up a couple of spares. I tested and de-gassed them in my SR-2000 in June of 2021

Walt - guess I responded to your suggestions on my other thread regarding sideband suppression.? Guess the two problems are closely related. Floyd

Walt - thanks for the ideas.? C52, C55, L10 C61 and L12 all checked out good and within tolerance.? The spectrum on 15 looked as bad as on other bands.? Next I checked the 6.250 trap again and

From the repair manual. [cid:ebc77e03-667b-4d28-a4ad-d3727bf7b657] Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters A majority of acceptance is not proof of correctness.

Caution, the 8122's must be matched. Walt Cates, WD0GOF https://wd0gof.com/Hallicrafters A majority of acceptance is not proof of correctness. https://wd0gof.com/bible-study/commentaries/

Clark...kudos for giving it a try....nothing to lose for sure. I once brought a Collins het osc xtal within 1 Khz of its marked frequency after being 30 Khz off and unstable. That one was probably my

Thank you walt. I will tackle this after work today. Radio number 2 really runs great!? ?The RX and TX audio is much better sounding on this rig.? I am using a classic EV664. I ran it on SSB low on

I baked the Xtals at 360F for 2.5 hours.? They did not move in frequencey. The LSB xtal is 1648.2 and not usable.? USB is closer but still way off.? Worth a try though! C

It is an alignment problem. See section 2-2-5 of the repair manual.?2.2.5 VFO ALIGNMENT NOTE: See section 2-2-5 of the repair manual, REPAIR MANUALS | WD0GOF. (

Is it possible the dial could have slipped on a shaft? Constant error could be mechanical. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998

If you cannot get equal unwanted sideband rejection on USB and LSB, the primary causes are: First is an unbalance in the output of the audio modulator circuit: V5A must equal V5B; T6 must equal T7;

Update. Radio number 1 has a fault with the ball bearings missing on load cap shaft. This allows contact.? Ordered ball bearings. Radio number 2 is alive!? ?Its band switch was hot switched. I

I'm retiring this August, then I'll have the time to really get in deep with some of my projects, the 42 being the first. Sent from my Verizon 4G LTE Tablet

I wonder what HT-44 owners are seeing for unwanted sideband suppression?? I'm able to get very good suppression on one sideband or the other, but finding a reasonable compromise has been elusive. 73,

McMaster Carr will have them

I ordered the balls off Amazon.? Good idea.? Not sure how to get them in there but they must have come out! I also found a replacement cap on Ebay. Looks very similar.? Will get that on its way

If they are ball bearings you may be able to get new ones from a hardware store. If you have any of the originals you can use them to determine the size needed. -- Richard Knoppow Los Angeles WB6KBL

I wanted to comment only on the change in capacitance value. The BB caps I dissected all had badly distorted windings. That would change the capacitance. Now, my first thought was that it was some way

I will dig into this more later in the week. Will also check the values on the resistors in the area as well. There is one bumblebee on the 6k6 that needs to go as well. Was hoping to get those after