Philco = RCA Engraved Base Globe 47 Vacuum Tube

  • Sold for: Start Free Trial or Sign In to see what it's worth.
  • Item Category: Tools
  • Source: eBay
  • Sold Date: Feb 12, 2011
  • Channel: Auction House

Mark us as your favorite seller as we will be listing many high quality, properly tested tubes in FEBRUARY!!

We have many years of experience in the field of electronics, and take pride in the restoration and repair of vintage items.

We will be offering vintage audio, radio, and test equipment as well as many new & vintage QUALITY PARTS in our store.

Please check back often!

Tube Type: 47 Brand:

Philco/RCA

Date/Markings: - Condition: Excellent

Tube Tests Minimum Result 1a Transconductance: 1500 2120 Plate Current: 20 31

Test Results, Simply Put:

Test excellent. This should work superbly in your equipment.

Please read our Auction Terms and conditions before bidding or purchasing. E-mail if you have any questions. !

How Others Test Their Tubes & Why My Method Is Best

95% test with ohmmeters, emission testers, and “service” transconductance testers like B&Ks or Hickoks. 4% test with equipment like the AVO testers, computerized cardmatics, or the Amplitrex, but these are rare to see in the marketplace, especially ebay.

With 95% of aforementioned test equipment, you’re getting the following tests, or less: emission, shorts, gas, and transconductance at low voltage unrelated to the manufacturer’s spec sheets or amplifier operating
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