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- 7R7 @ The Valve Museum - r-type. org
The 7R7 is a screened pentode and double diode This is the classic valve design for AGC rectification, signal detection and first audio amplifier The alternate use for the pentode is as an IF amplifier as it is of a semi variable-μ type The 14R7 has a 12 6 Volt heater Made in England by STC under the Brimar brand name
- 7R7 octal sub - Antique Radio Forums
Re: 7R7 octal sub Post by Tube Radio » Sep Mon 05, 2016 8:05 pm I had thought of a cathode resistor, but the original circuit in the Silvertone was based on the two diodes being used in the tube and the cathode had to be grounded
- 7R7, Tube 7R7; Röhre 7R7 ID2996, Double Diode-Pentode . . .
Tube 7R7 or Röhre 7R7 ID2996, Double Diode-Pentode, Loctal-8, B8G (Sylvania, 1938) and RF IF-Stage shown Radio tubes are valves
- Tube Cross Reference 7-10 - Nostalgic Kits Central
Tube: Replacement: Tube: Replacement: 7A4 7A6 7A7 7AB7 7AG7 7AH7 7AJ7 7AN7 7AU7 7B7 7C4 7DJ8 7E5 7E7 7EK7 7ES8 7FC7 7G7 7H7 7HG8 7J7 7R7 7S7 7V7 7X7 8A8 8AU8 8AW8A
- The PHILCO Phorum - Philco turntable fries 7R7 tube in 47-1230
After tapping on the tubes, I found the n o s 7R7 tube I just purchased and played over 20 hrs testing from AES was very microphonic I replaced the 7R7 tube, and the Radio receiver started working again My question is this, did the turntable motor pass some AC current via orig input wire back into the chassis to take out the nos 7R7 tube?
- Vintage Radio Tube - 7R7 Rogers - eBay
Find many great new used options and get the best deals for Vintage Radio Tube - 7R7 Rogers at the best online prices at eBay! Free shipping for many products!
- 7R7 Audio Tubes - www. thetubestore. com
Order 7R7 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier
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