(!!!!) (Recommended Pair) E288CC=8223 Siemens branded Philips SQ 1975 (32/33ma and 33/35ma)
$ 199.99
1 low noise pair) E288CC=8223 Siemens branded Philips SQ 1975 (N6-5A=1975) same date codes
1 tube) 32/33ma Gm=20,800/20,200
1 tube) 33/35ma Gm=20,000/20,800
NOS Ma = 30ma
NOS Gm = 18,000
(Specs: Vfil=6.3 Ifil=0.475A, Vplatemax=250V Pwattsmax=3.0)
Typical Operation:
Va Vg1 Ia Ra Gm Rk Mu
100 -1.5 30.0 1,400 18.0 350 20-25
See more: vacuum tube
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 (Recommended Pair) E288CC=8223 Siemens branded Philips SQ 1975 (32/33ma and 33/35ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_715cd43d-07ac-4b9e-8ccb-4e95d233f9d7.jpg?v=1599944523){kind=link}
 (Recommended Pair) E288CC=8223 Siemens branded Philips SQ 1975 (32/33ma and 33/35ma) "Pin It")