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National Radio R-175 Plate Choke - Attn: QRO Builders Makers Tesla
National Radio R-175 Plate Choke - Attn: QRO Builders Makers Tesla

National Radio R-175 Plate Choke - Attn: QRO Builders Makers Tesla

$ 9.24

Availability: 100 in stock
  • Refund will be given as: Money Back
  • All returns accepted: Returns Accepted
  • Brand: National
  • Type: Plate Choke
  • Item Length: 188 uH
  • Band: HF
  • Restocking Fee: No
  • MPN: R-175
  • Compatible Brand: None
  • Condition: Used
  • Item must be returned within: 30 Days
  • Compatible Model: HF Power Amplifiers
  • Return shipping will be paid by: Buyer
  • Year Manufactured: Prior to 1956
  • Country/Region of Manufacture: United States

    Description

    Vintage National Radio R-175 plate choke in very good condition.
    The R-175 choke reactance is high throughout the 10, 15, 20, 40 and 80 meter bands.
    The R-175 choke is suitable for parallel-feed as well as series-feed in transmitters with plate supply up to 3000 volts modulated or 4000 volts unmodulated. Inductance 185 uH. (
    measured 188 uH
    .), distributed capacity 0.6 uuF., d-c resistance 6 ohms, d-c current 800 ma., voltage breakdown to base 12,500 volts.
    This coil dates from prior to 1956. It appears to have never been used. It is from the estate of a local SK and has been in storage. However I am selling this as "used".
    NationalR-175 plate choke pre-dates the R-175A which was revised to include 6 meter operation. This coil is NOT the R-175A.
    It is the R-175 –original version
    .
    Please look at ALL the pictures and be sure you have read the description before you purchase.
    USA only, thanks.
    The product in the pictures is what you are purchasing. You will receive the exact product shown.
    If you have any questions, Please, please ask. I reply quickly to all inquiries.
    Please make sure your shipping address is correct. This is your responsibility.