Specifically referring to the Rocket here; back when I built my Rocket I did some research on AC30 iron. I remember that the Hayseed 30 builder had switched from the Mercury Mag Woden clone OT to a Heyboer (unsure of exact model) and had some complaints. The Heyboer had a wider frequency response and made the amps too boomy on bottom and too fizzy on top when overdriven. He ended up coming up with what he called the Alwood mod which IIRC was a mod package to the Cut control to limit the frequency response when using the Heyboer OT (since MM iron can be so expensive).talbany wrote: FWIW.The mercury mags were/are wonderful iron in their own right but lacked the overtones... They also produce much of the sterile qualities associatted with using M6 where the origionals did not sound the least bit Hifi-ish (this could be due to the fact that this was seasoned iron) or perhaps the scatter winding technique Dynaco used ..They did generate a nice wide bandwidth..
But that Heyboer OT he was using could have been (probably was) different than the HTS-8093. I guess the only reason I'm posting this is because it sort of agrees with what you posted about the overtones (but maybe not so much the hifi-ish part). I guess those overtones were not there in the old 60's Voxes. Maybe that is one of the things KF was trying to improve upon with the Rocket.
Thinking of doing another Rocket and choosing trannies hasn't gotten much easier! But it's good to have choices!
