dcgillespie's Recent Activity

  1. dcgillespie replied to the thread Fisher 400 Rebuild Project.

    The labels on the mosfet leads are in fact correct for that device. When I first worked with mosfets, I always thought the labeling was...

    Apr 26, 2018 at 2:22 AM
  2. dcgillespie replied to the thread Problem with a DIY Dynaco ST-35 clone.

    Make sure too that your coupling caps are not reversed between the output tubes. That is, the coupling cap from the plate of the...

    Apr 25, 2018 at 7:32 PM
  3. dcgillespie attached a file to the thread Rx For the Magnavox 8800 Series.

    Modification Considerations 1. Like the previous two Magnavox efforts, a direct connection to my 121.5-122.0 vac line produced 7.0 vac...

    SAM_2414.JPG SAM_2403.JPG Apr 25, 2018 at 4:37 PM
  4. dcgillespie replied to the thread The End of an Era: The Fisher 55-A.

    Answered via PM. Dave

    Apr 25, 2018 at 12:35 PM
  5. dcgillespie replied to the thread Problem with a DIY Dynaco ST-35 clone.

    As Brice said, if the plate leads are reversed, then the unit becomes an oscillator. BUT, even if the plate leads aren't reversed but...

    Apr 24, 2018 at 11:13 PM
  6. dcgillespie replied to the thread magnavox 8802 conversion from 6v6 & 6eu7 tubes to 12v6 and 12ax7 tubes is done!!.

    Nice job Kirk! If I may however, in looking at the underside view, at the end of the NFB wires leading back from the output terminal,...

    Apr 24, 2018 at 7:38 PM
  7. dcgillespie posted a new thread.

    Rx For the Magnavox 8800 Series

    When I posted my original thread on the 8600 series, I had absolutely no idea of the interest it would generate in the AK tube...

    SAM_2383.JPG SAM_2398.JPG SAM_2397.JPG SAM_2382.JPG SAM_2381.JPG

    Forum: Tube Audio

    Apr 24, 2018 at 1:39 PM
  8. dcgillespie replied to the thread Help Saving 400-CX SA-100 and 100-R Tuner.

    I would not use discrete PS caps with a stock SA-100. The amplifier runs extremely hot under the bonnet which would certainly work...

    Apr 23, 2018 at 4:43 PM
  9. dcgillespie replied to the thread An Attempt At Fisher 400C Transformation....

    Ty -- The negative side of the 10 uF 100 volt cap should be grounded. The negative side of the DC heater system should be returned to...

    Apr 21, 2018 at 12:37 PM
  10. dcgillespie replied to the thread An Attempt At Fisher 400C Transformation....

    A 35V rating is perfect for the caps use at C50. 47uF for the three sections of C49 is fine as well, and yes, these sections are still...

    Apr 20, 2018 at 7:34 AM