• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

ta-500

  1. daylite

    Transistor-Buffered Zener Regulated Bias Voltage Supply

    A bias voltage design for TA-500, K-100, 500 Mono that's suitable for vintage & modern output tubes. There have been several discussions of the design of the Fisher “bias-voltage from heater-string” method that Fisher used to generate the negative potential needed to bias output tubes. Dave...
    • daylite
    • Thread
    • 500 mono bias adjustment bias voltage ibam k-100 ta-500
    • Replies: 3
    • Forum: Fisher
  2. daylite

    Mono 500 and K-100 Comparison

    <------Update: I found a knob for this guy! TA 500 vs K-100 schematic comparison............Post #1 Under-chassis photographic comparison...........Post #16 The Model 500 Mono is >95% the same at the K-100 chassis used in some Fisher consoles. The Sams Model 500 service manual is 100x...
    • daylite
    • Thread
    • 500 mono k-100 ta-500
    • Replies: 24
    • Forum: Fisher
  3. A

    Fisher TA-500 --- Restoration

    Fisher TA-500 I just won an auction for a Fisher TA-500 (tube, mono; maybe Fisher’s first such product). It was an estate auction, not an electronics auction. The auction photos showed a very nice unit. We’ll see. Even though the auction house stated that “the radio worked”, I will want a...
  4. M

    Fisher 500 knobs 3d printed

    I recapped and repaired a Fisher 500 mono receiver that I purchased a few years ago. Unfortunately, the knobs were missing. I watched eBay for several years for a replacement set, with no luck except for one inner and one outer knob, so I decided to try having them 3d printed. I used a free CAD...
    • mmblh
    • Thread
    • 3d printing fisher 500 mono knobs ta-500
    • Replies: 14
    • Forum: Fisher
  5. M

    Fisher 500 mono tube bias

    I have a Fisher 500 mono receiver. The chassis is marked "EL37" for the output tubes. The EL37's were replaced by 6L6GB's by a previous owner. EL37's are scarce and way out of my budget, and new KT66 won't fit (glass diameter is too large). The only Sam's schematic I can find is very close, but...
    • mmblh
    • Thread
    • bias adjustement ta-500
    • Replies: 10
    • Forum: Fisher
Back
Top Bottom