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Home > Classified > Accessories > Vacuum Tubes > Matched Pair of Elrog 300Bs

SOLD - FOR SALE: Matched Pair of Elrog 300Bs

Item #650107575
Info: Matched Pair of Elrog 300Bs  

Asking Price:
USD $750.00
Retail Price: USD $1900.00
Payment method: Paypal, Money Wire, ACH/Direct Deposit
Shipping Weight: 4.00 (lbs) Calculate Shipping
Shipping Dimension: 12.00in x 8.00in x 5.00in
Condition:
9 - Excellent (?)
Date Posted: May 25, 24 6:50pm (PST)
Edited: Jun 18, 24 1:48pm
About Seller: TX, United States
PayPal:
Days in System:24
Ships to: United States
Shipping Cost:
  • Allow Local Pickup
  • United States: FREE


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Description

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** This Ad is Marked as SOLD by seller and cannot be responded to. **

I have for sale a matched pair of Elrog 300B vacuum tubes. I’m the original owner and the tubes have approximately 300 hours on them. They have been tested on my Amplitrex AT1000 tester. They were tested under the following conditions:
Vp (plate voltage) 300V, heater (filament) 5.0V, Vg (grid voltage) -58.6V
Results:
Tube 1 C3101 Ip (plate current) 52.6 ma, Emission percentage 87%, transconductance (Gm) 2.94 ma/V, 89%
Tube 1 C3108 Ip (plate current) 50.2 ma, Emission percentage 83%, transconductance (Gm) 3.02 ma/V, 92%
Please note that Gm (3.3 ma/V) and amplification factor (3.3) for the Elrog 300bs are different from other 300Bs because of their design.

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