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Hi Mike, Yes, I see folks bought his remaining stock after I posted about it. But he emailed me today that he has 100 on order, but didn't say when they're expected. First person to notice his ad

Steve, Thanks for the link and schematic. I was going to order some but it looks like he is out of stock. We can fall back to Dan's Small Parts.

What is the downside of using LO above the IF , i.e. 17400..17800kHz? 73, Mike AF7KR

Hi Ryan, A couple of issues: 1. 455 kHz doesn't lend itself well to? rejecting receiver images adequately. For AM BCB, it works OK, but the higher in frequency you go, the tougher it is to filter

Yes, 0.1uF, standard bypass cap--I didn't notice I hadn't labeled it until now.?? :) Steve

Hey everyone, I don't think I'm going to get around to building it. I was very excited about scratch building a PSSST-20 and the kit is awesome, but time constraints are causing me to be more

How about an IF of 455 Khz? Readily available and out of any amateur band. [email protected]> wrote:

Thanks Steve,? exactly what I need.? One question,? is the unlabeled capacitor to the left of T2 a .1uF? Doug

I am thinking building a version of my single band single band 40 Meter SSB transceiver? to work on 60 meters, but have to carefully choose an IF frequency. The current IF frequency for te 40

Here is the schematic of the PA transistor test fixture I'm using, and a picture of it with a reference 2SC5739 installed. It's easy and fast to simply bend the base and collector leads out at right

Thank you Steve - I ordered a few. I think that if sellers are slow to ship, they should set expectations, by saying something like, "I only ship at weekends. If you order on Monday, your order will

Steve can you share a schematic of your test setup.? Maybe a couple of pics. Doug,? KI6DS

I've recently been testing a 14Mc power amp circuit, comparing several output transistors for 5 watts (45 Vpp) into a measured 50 ohm dummy load. I put a scope probe on the output and adjust for 45

Very sorry to hear that Charles has passed. He contributed much to our hobby. Prayers for his family. Jim WB4ILP [email protected]> wrote:

Sad news. My first ever successful regen build was a Kitchin design. 73 de VK2HHS Henrik

Gang, I first discovered Charles Kitchen when I started looking for regenerative receiver circuits many years ago. A few days ago I watched this very informative youtube video in which Mike Murphy

Folks, Chuck mentioned scoring a bag of 2N3904s and I similarly discovered a mess o' 2N4401s. Suspecting that there may be caches of the popular NPNs (and their matching PNPs) around, here's a sample

Here are the schematics for all of the boards for the 10 Watt SSB transceiver discussed

The IF is 12.288 MHz which works well for 40 meters because it far away from the LO and band frequencies. For LSB the LO is in the 5 MHz range. The crystals I used for the filter are CTS MP122's:

I rolled my own for both the mixer and the product detector. Its a diode ring DBM.? It consists of 2 trifilar wound FT37-43's with #30 AWG magnet wire, and 4 BAT54 diodes. The first mixer has a 100