[Boatanchors] [AWA Group] Can Meissner be wrong twice?

[Michael Bittner]

Steve, With the xfmr primary shorted, the secondary as presently wired measures: 

D to CT = 41 uH           1.6 Ohms

D to AVC = 11 uH        0.8 Ohms

CT to AVC = 12 uH      0.8 Ohms

The new inductance measurements seem to confirm the previous resistance measurements. So the lug labelled AGC is the center tap and will be grounded. The lug labelled D will go to the crystal and the lug labelled CT will go to the 10 pF phasing capacitor.  The lugs labelled CT and AVC will be swapped when wiring the receiver per the Meissner diagram.

https://photos.app.goo.gl/W4YsaNDavYdrs9y67



Jim, I have several 455 kHz xtals including this one from Hallicrafters:



https://photos.app.goo.gl/sgo3WGHgYTB5FS3Z7



Its series resonance is 450.415 kHz, but I expect it wil be closer to 455 in circuit.



Mike, W6MAB






  ----- Original Message ----- 
  From: 'Steve Flood' kk7uv at bresnan.net [AWAGroup] 
  To: AWAGroup at yahoogroups.com 
  Sent: Wednesday, December 26, 2018 10:59
  Subject: RE: [AWA Group] Can Meissner be wrong twice?


    

  Out of curiosity, the leads are either labelled wrong, or your ohmmeter may be lying to you.



  Try shorting the primary leads together and then take inductance readings on the secondary leads as you did before.  See if this agrees with the possible mis-labeling of the leads.



  Steve, KK7UV

  ___




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