Ianis S51DX in Slovenia was the first call sign heard. Some peaking and tweaking remains to be done, but the receiver is working.
Congratulations to Scott KQ4AOP who got his Direct Conversion receiver working yesterday, And congratulations to Armand WA1UQO who got his regen receiver working. I think all of us are following Farhan's advice and are taking some time to just listen to the receivers we have built ourselves.
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Power standing wave null… solution
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Power standing wave null… more left readers with “homework” to create the
Pfwd and Prev traces. Remember that Pfwd and Prev are interpretations in
the cont...
4 hours ago
In your YT thumbnail, your speaker cone looks transparent
ReplyDeleteIt is transparent.
DeleteBill and Dean - Thank you for sharing and documenting this receiver. I greatly appreciate you publishing the circuit, class notes, and build videos. That got me 75% to completion.
ReplyDeleteI feel blessed that both of you chipped in and encouraged me through the troubleshooting to finally getting the receiver to start “breathing RF”.
Those first sounds were my first time ever hearing any Amateur Radio first hand!
Bill, one of the most valuable homebrew tips I ever received was in 2017 from my old friend Ron WD8PNL (SK) regarding setting of the BFO. Just heed this and it is set and forget, so I have never needed to "tweak" any of my BFO circuits.
ReplyDelete"As regards placement of the carrier oscillator/BFO frequency in relation to the passband of the crystal IF filter for LSB operation, place it about 250Hz higher in frequency than the frequency that corresponds to the -6dB level on the high frequency slope (Fh) of the passband."
However, deviating from this slightly also works well and has proven to be highly convenient for me, because on my 20M SSB 10W rig I use an 11 MHz crystal filter with a 3 MHz VFO, so when my frequency counter reads 3.3030 I know I am exactly on 14.300 MHz, which enables varactor tuning to be used quite effectively (easy tuning with a coarse and fine pot in series) and is a space saving feature since it eliminates large variable capacitors, gears, and dial marking duties.