Description
ECC35 Mullard UK production
This is a NOS ECC35 tubes made by Mullard, UK. The tube bears the Pope brand name. The properties of this tube are legendary and widely known. I refer to the many threads on the web for more information.
The tube has the typical rounded plates and a bottom D-getter with a beautiful It is are thoroughly tested. And the tube has excellent test values that match the factory specification (see test results below).
The tube bears no visible type/date code.
Sonics
Excellent preamp valve, super linear, low noise, very smooth extended highs, very good in phono stages. Open and airy top end.
> one of the best vintage 6SL7 types ever made.
Test method & results
Tested with: AVO Mk IV, AVO Valve Data Manual 23rd edition 1981, Utracer 3+, Philips 1532, RFT stabilised power supply, 2x Korad KA3005P programmable power supply and 2x Keithley 2700. Gas and shorts tested with: AVO Mk IV. Ia & mu are tested with the official factory test setup: Va = 250V and Vg = – 8V. Precision of the test voltages 2%; measurement after 10 minutes stabilization.
Test results*
| Valve 1
V54 |
Ia (plate current):
Transconductance (Gm): Gas test, Shorts test: |
2,3 /2,5 mA
2,0 /2,1 mA/V OK |
= NOS / NOS
= NOS / NOS
|
(Ia new is: 2,3 mA, Gm: new is 2,0 mA/v)
* For test methods and factory specification read the tube testing page.
Short description
| Tube type | ECC35 |
| Quantity of Tubes | One |
| Brand | Pope |
| Manufactured by | Mullard, UK |
| Date codes | none |
| Construction | Rounded plate |
| Getter Construction | Bottom D-getter |
| Print Condition | See pictures |
| Box included | Generic white box |
| Equivalent tubes: | 6SL7, 5691, 6SL7W, 6SL7WGT, 6113, ECC35, 6SL7GT, 6SL7L |
| General test results | NOS |
