M U Inc 7235 High-Mu Regulator Triode Vacuum Tube USA 24289 Top Cap Untested
$119.95
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View & buy on eBay- Brand
- M U Incorporated
- Model
- 7235
- Condition
- Used
Listing details
M U Incorporated 7235 High-Mu Regulator Triode — Untested
A beautifully preserved example of the distinctive American-made M U Incorporated 7235, created for specialized high-voltage regulated power-supply and voltage-amplifier applications.
The strong original glass markings read:
M U
7235
USA
24289
The number 24289 is the manufacturer/CAGE code associated with M U Incorporated. It reinforces the exact manufacturer identification and is not being presented as a production date.
Published 7235 type information
Published engineering data identifies the 7235 as a miniature high-mu triode designed for regulated power supplies and voltage amplifiers operating at plate potentials between approximately 1 and 10 kilovolts.
Published type specifications include:
Heater voltage: 6.3 volts
Heater current: 0.30 amp
Amplification factor: 550
Transconductance: 850 µmhos at the published operating point
Maximum anode voltage: 10 kilovolts
Maximum average plate current: 5 mA
Maximum anode dissipation: 10 watts
Nine-pin 9KE base
Top-cap anode connection
These are published specifications for the 7235 tube type and are provided to help buyers confirm the proper application. They are not individual electrical test results for this tube.
Physical presentation
This particular example presents exceptionally well:
Strong, clearly readable original markings
Clear intact glass envelope
Dark metallic getter
Secure top-cap connection
Straight pins
Complete and orderly internal structure
Clean overall vintage presentation
The tube has not received an electrical performance test and is offered as an untested vintage component. Its identity, markings, construction, and physical presentation are documented through detailed photographs.
Supplied in a new white replacement box for clean storage and protected shipment. The box is not original to the tube.
The photographs show the exact tube included in this listing. It will be thoughtfully packed with focused protection around the glass, pins, and top cap.
VTubeAudio — individually photographed, accurately identified, thoughtfully presented, and securely packed.
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