''S'' - Special quality tubes
Low-hum, noise & microphonics version
VERY HARD TO FIND : 2 NEWS TUBES WITH OPEN PLATES
TESTED ON METRIX U61b
Opened plate
Very low noise
Free of microphonic
Soft highs and edgy
Use this tube to maintain your amp's original tone
Lampe Valve Valvola Valvula Röhre チューブがぶ飲みが します type : Double triode preamp tube amp
Quantity : 2 Tubes
Can be used for power triode amp with finest double c-core parmeko / Gardners / Greshams / Freed / Partridge transformer / lampizator horizon / Bendix / Choke as VT24 GPO , CV1636, 300b, 2a3, 45, 46, 50, VT-52, 300B, 205D, R120, VT25, 10Y, RS242, PTT3, 101d, R120...
Nice for single ended tube amp , pusch pull or old radio.
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