05-22-2016, 03:21 AM
I don't know if you noticed this on the Eminar page atOzvalveamps.
Really interesting what this guy says.
Really interesting what this guy says.
Quote:More memories
By: genpk on AGGH, August 30, 2005, 08:24:12 AM
Hi guys, saw the post on Eminars which I have done quite a lot of work on over the years.
History as I know - Made in Melbourne from about early 1970s to about the last one I saw was dated 1982 I think and was numbered 2750 ish. As mentioned transformers were built like trucks and made by a company called TRIMAX. TRIMAX was bought out by Ericson Communications and eventually mothballed as it was a competitor to them. I have seen late model Eminars with Ericson badged transformers.
They were built as a cheap alternative to both Fender and Marshall imports which at the time were expensive due to Aussie import duties. They built a 40 watt, a 100watt and a 150 bass head as well as 100watt P.A heads.
They had a unique setup for their time on the output tubes using grid resisors to enable the output to use either EL34s or 6L6 tubes with readjusting bias control.
Many of the capacitors were the same parts used in english JCM 800 and according to my findings circuits were either wired as an JCM 800 type amp or a Fender twin type setup depending on what was required. In an article Ritchie BLACKMORE mentions an Eminar bass head to be a head to find for a great sound.
They can be configured to just about anything as they are basically point to point wiring. They are a very powerfull amp and on the 150 watt models can have up to 700 volts going to the output tubes (not many current tubes can handle that). Maybe a candiate for KT88s.
Can be suseptable when power spikes occur, takes out power diodes or output transformers. All in all, one of the loudest, cleanest amplifiers you will ever hear. The quad boxes had celestion green backs or G12s in them - yes as stock standard!!!!