Tools, Tones and Toys for Guitarists
From the Hammond 1750 output transformer series, this is listed as a drop-in replacement for a Fender Vibrolux Tweed, 5F11 – they’re supposed to look similar to the original Fender transformer where possible. That being said – this sticks out like dog’s balls when mounted on a crusty old amp. Materials etc are also supposed … Read more
Yes, this is super nerdy and I may be the only person that will ever find it useful – I combined the specs from the Hammond 125SE series into one table, as I found it really annoying to check through individual datasheets. I recently installed one in a Vox AC4-C1 12 just to see if … Read more
Valvo transistors were produced in Germany, as a subsidiary of Philips (not unlike Mullard in England). More information on Valvo can be found here. My experience with Valvo, is that they are pretty much identical to their English counterparts. The OC45 is a PNP germanium alloy transistor intended as IF amplifier in AM broadcast receivers. … Read more
GEC is the General Electric Company of England, not the one from the U.S.A. These are occasionally branded as Mullard. Full write-up on GEC / GET transistors can be found here GEC GET 102 – 114 GERMANIUM TRANSISTOR DATA Type V Max Hfe P Max (mW) I Max f (Mhz) GET102 30 … Read more
Brimar transistors were made by Thorn and were also commonly branded as Mazda. A full write-up can be found here The AC113 is an audio frequency amplifier or driver type germanium transistor. AC113 GERMANIUM TRANSISTOR DATASHEET TRANSISTOR EQUIVALENTS Being a fairly generic audio amplifier, they’re listed as being similar to a number of common amplifier … Read more
Germanium transistors from the former USSR are cheap, generally high quality, available in large quantities and very cheap compared to their European counterparts. They are their own thing and are not direct copies of European transistors – you can find similar transistors, but they are never like-for-like replacements. They nearly always sound different and … Read more
Transistor datasheets from Mullard for; Germanium: OC44, OC45, OC70, OC71, OC72, OC74, OC75, OC78, OC81 and OC81D Germanium: AC126, AC127, AC128, AC176, AC187, AC188 Silicon: BC107, BC108, BC109, BC186, BC187 MULLARD DATA BOOK 1965 – 66 MULLARD DATA BOOK 1974 – 75
