Alembic f2-b voltage conversion?

Log Out | Topics | Search Moderators | Register | Edit Profile

Author Message sharkey New Username: sharkey Post Number: 5 Registered: 2-2004 Posted on Tuesday, February 10, 2004 - 4:48 am:    I've just picked up a vintage f2-b that runs on 110 volts (comes with outboard transformer) can anyone recomend an inboard 240volt transformer with or without voltage selector. peter_jonas Junior Username: peter_jonas Post Number: 29 Registered: 11-2002 Posted on Tuesday, February 10, 2004 - 4:57 am:    That is interesting Sharkey. Can you post a photo of that gear? Peter sharkey New Username: sharkey Post Number: 6 Registered: 2-2004 Posted on Tuesday, February 10, 2004 - 6:10 am:    I won it on ebay thanks to the prompt reply to one of my threads from angelboy thanks mate. I've not had delivery of it yet but heres a copule of photos the seller had. harald_rost Junior Username: harald_rost Post Number: 44 Registered: 6-2002 Posted on Tuesday, February 10, 2004 - 6:13 am:    I think you can switch the F2-B inside between 110 and 220 Volt. I bought a 1976 F2-B which was 100 V original. The Folks at Alembic modified the unit for me. Now there's a switch on the backside between 110 and 220 Volt. Harald peter_jonas Junior Username: peter_jonas Post Number: 30 Registered: 11-2002 Posted on Tuesday, February 10, 2004 - 1:11 pm:    Sharkey, For a moment I misunderstood you, and thought the power transformer of your F-2B was outboard. But it is obviously not the case. Rather, you have to use an outboard step down transformer to run the preamp from 240 volts. It's clear now. My new F-2B has a power transformer, which (like most) has twin primary windings. Whether the primaries are connected in series or parallel will determine if the unit runs on 100-120 or 220-240 volts. It is likely that the same arrangement exists in your F-2B. As far as I can see there is no internal or external voltage selector switch, this is hard wired inside the unit. A tech should be able to make the necessary adjustments in about 15 minutes. A the same time, however, it may also be a good idea to install a new power chord that has a UK plug and an earth wire on it and connect that to the chassis. If I can see it correctly on your photos, at the moment the power lead is only two core (no earth). Today Alembic supply all their mains operated gear with an earthed chassis. It is just safer that way. Once again, this is not hard to do, but consult your tech. Cheers, Peter