SOLD Perfectly Matched Pair, 3-500ZGs

Discussion in 'Ham Radio Gear For Sale' started by N9CHM, Nov 30, 2018.

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  1. N9CHM

    N9CHM Ham Member QRZ Page

    Found these when I was going through some boxes at the Estate (WA4MIF). They are Pride brand which is a Chinese tube which was a precursor to Taylor tubes (same factory I believe) which RF Parts sells. Ran a pair in my Drake L7 years ago, very good tubes. I sent them to Richardson Electronics in FL for testing. They are a perfectly matched pair with 100% output. 5KVDC to the anode ground showed no current draw, i.e. vacuum is good. 5VDC to filament showed normal current for a new tube (14.8A). Pulse tested under load showed cathode emission of a new tube. Same report for the 2nd tube. They are perfect N.O.S. tubes. These heavy duty graphite anode tubes have a higher plate anode dissipation than regular 3-500Zs, up to 600W, with appropriate cooling. The data test sheets from Richardson will be included. Price is $325 for the matched pair shipped to lower 48 (FEDEX). They will be shipped in appropriate boxes for this tube, and double boxed of course. USPS M.O. or PayPal (no fees to you). Thanks and 73, Dave
     

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    KG4BFR, KE9OL and W6GH like this.
  2. N9CHM

    N9CHM Ham Member QRZ Page

    SOLD....
     
  3. QRZ
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