(!!!) (PAIR) 5881 Tungsol tests like new 1957 and 1963 with broken center guide pins - see photo (72.5ma and 68.2ma)

1 Pair) 5881 Tungsol test like new 1957 and 1963 with broken center guide pins - see photo

1 tube) 72.5mA and Gm=5600

1 tube) 68.2mA and Gm=5550

Tested on Amplitrex

Good used Ma range 55-70ma

Good used Gm = 4500-6000
 

recommended for:

- Pro Dawg (copy of 5E5A Circuit)
- Naylor SD60
- Fender Bassman RI 1956, 1959
- Fender Pro-Amp 1962
- Victoria Regal 2007
- Melody SP3 amp
- Heath W4AM mono amps
- Audio Note SORO linestage
- Mesa Boogie Mark 4
- Supratek
- CARR Rambler
- Line6 Spider Valve 112 (2007) Reinhold Bogner Amplification UK
- Clark Tyger 2011
- Clark Piedmont 2003