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Saturday, June 23, 2018

SolderSmoke #205 Solstice, Mars, Antennas, Displays, Phasing Fix, VFOs, Lexicon, MAILBAG


June 23, 2018

SolderSmoke Podcast #205 is available:  

http://soldersmoke.com/soldersmoke205.mp3

-- Summer solstice.  Mars Observations.  Graduations.  Internships.  Fathers Day.

-- Antenna Angst:  Pete's tribander and Bill's Moxon.  Insulation and resonance?

-- Pete's work on color displays. 

-- Bill goes back to fix up older projects:  

-- Fixing the Frankenstein Phasing RX.  Found an open choke!

-- Tightening up the HRO Dial. 

-- Achieving Juliano Criteria stability on a BITX20 VFO. 

-- Lexicon additions:  "Scratch Built"  "Hardrock Radio"  

https://english.stackexchange.com/questions/39551/where-does-the-saying-made-from-scratch-originate

-- PastaPete:  http://www.pastapete.com/

MAILBAG: 
Bob Crane W8SX Corrspondent at FDIM
Ralph AB1OP  Building LBS
Bruce KC1FSZ  Digital Pot
Jason W5IPA uBITX in Juliano Blue
Rogier KJ6ETL  ON THE AIR WITH A uBITX
Special thanks to Tim Walford for 25 years of Hot Iron.  






6 comments:

  1. I always enjoy your podcast. I usually listen at home. Today I'm on a road trip, listening via Stitcher, through my Android phone and my car stereo. The audio dynamics are a little over the top for on-the-road listening. With the volume at a reasonable level, some loud bits get objectionably so, and some soft bits are inaudible behind the road noise. Maybe you could work on your mic discipline, or add a compressor/limiter to you recording chain? Thanks, John AC2RL

    ReplyDelete
  2. John -- Yea sometimes it can be hard to get the levels right. I went back and boosted my audio in the mp3, so if you listen to it again it should be better. Pete got a nice boom mic that makes consistency easier -- I'm going to get one too. 73 Bill

    ReplyDelete
  3. JAMES HARDIN KM4WBXJune 25, 2018 at 7:43 PM

    about your moxon antenna. never used one, but you commented that wavelength calculations were effected by presence of an insulator. I think you have forgotten air is an insulator and has a dialectic constant of ~1.0

    ReplyDelete
  4. you can see an antenna as a LC circuit or resonant tank circuit
    with impedance and capacity.
    if you change the dielectric material of a capacitor you change the capacitance
    therefor the resonance of the antenna changes too.

    ReplyDelete
  5. Tim: I think that was the conceptual part I was missing. Thanks.

    ReplyDelete
  6. Nice photo of the old radios and homebrew gear, but where is the SDR with the big display waterfall display?

    ReplyDelete

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