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Pye PF91A pre-amplifier and control unit.
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30-04-2016, 07:18 PM
(This post was last modified: 30-04-2016, 07:21 PM by Geordie McBoyne.)
Same base connections as the ECC40 are the Mazda 6L1 and the 6L19. Characteristics are quite different from the Philips/Mullard valve. The 6L1 is a very low impedance double triode: ra = 4Kohms, mu = 16, gm = 4mA/V. The 6L19 characteristics are closer to the ECC40. 6L19: gm = 3.4mA/V, mu = 55, ra = 16Kohms.
Geordie McBoyne. |
| Messages In This Thread |
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Pye PF91A pre-amplifier and control unit. - by Geordie McBoyne - 27-04-2016, 08:17 PM
RE: Pye PF91A pre-amplifier and control unit. - by Geordie McBoyne - 30-04-2016, 07:18 PM
RE: Pye PF91A pre-amplifier and control unit. - by pwdrive - 30-04-2016, 07:29 PM
RE: Pye PF91A pre-amplifier and control unit. - by Terry - 30-04-2016, 07:45 PM
RE: Pye PF91A pre-amplifier and control unit. - by pwdrive - 30-04-2016, 08:14 PM
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