Changes between Version 14 and Version 15 of GretchensAmp


Ignore:
Timestamp:
May 11, 2022, 8:39:48 AM (5 months ago)
Author:
Eric Hazen
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • GretchensAmp

    v14 v15  
    2121'''2022-05-10'''
    2222
     23Left channel dropped out.  Took off the bottom and checked voltages.  Problem went away, sigh.  For the record:
     24
     25http://ohm.bu.edu/~hazen/TubeAmp/GretchensAmp/schem_voltages.jpg
     26
    2327Preparing for delivery.  Attached bottom screen and feet.  Looking for spare tubes.  Operating preamp tube is ECC83S (12AX7).  Tried an ECC82 (12AU7) and the gain is noticeably lower.
    2428
     
    2731* (1) JJ ECC83S
    2832* (2) JJ 6V6S
    29 
    30 Now the left channel doesn't work (sigh).  Need to open it up.
    3133
    3234'''2020-06-01'''