How many types..

of OTL's are there?

tabl10s10-26-2005 10:26pm

bpwalsh Details Discussions Posts This discussion Message User 1,202 posts 10-27-2005 at 04:12pm Copy Comment URL Report Comment Edit Delete Do you mean brands? Atma-Sphere Joule Electra Tenor (they went out of business, not sure if they're back) Berning (a point of contention since some claim it's not a true OTL) There are several others by companies that are defunct. Brian
clio09 Details Discussions Posts This discussion Message User 3,355 posts 10-27-2005 at 05:25pm Copy Comment URL Report Comment Edit Delete Add Transcendant to the list.
atmasphere Details Discussions Posts This discussion Message User 11,807 posts 10-27-2005 at 08:03pm Copy Comment URL Report Comment Edit Delete Silvaweld, Graaf and Croft are three more. Generally OTLs seem to split along two lines: Symettrical circuitry, using a Circlotron for an output circuit, and Asymettrical, using a Totem Pole output, which looks a bit like a mu-follower circuit. OTLs may or may not have an output coupling capacitor. Totem-Pole types usually use negative feedback, although there is at least one patent where the amplifier did not use any. In Circlotron OTLs, negative feedback is entirely optional. Either can be any combination of triode, tetrode or pentode, and class A, AB or B.