dynaco?

[talbany]

Mark
I just finished a JTM 45 and used some seasoned A-470 Iron (420 on the Plates)..Barely got it on the chassis..Just frickin killer sounding w/ 2 34's ..No doubt the 470 would sound good mounted on a flip flop..Just wicked on an Express..GREAT IRON>>

All The Best

Tony

[M Fowler]

Tony,

That sounds like a great amp. I was wondering what you were going to do with that chassis you picked up, that Weber JTM-45, I was thinking about going for it myself

I was going to use a A-470 in a Orange retro 50 build I have going but was confused by that 35w/70w statement Triode showed.

I should have read further, ended up getting a Marshall OT for it.

Mark

[dartanion]

I have done all my big bottle Rocket style amps thus far with the Pacific Express OT and they sound great. I will be trying out the Pacific Rocket OT (A470 type) in a big bottle soon. Another option to try.

[RJ Guitars]

I have the notes from Phil at Heyboer and he gives me some of the details on the HTS-8093-1. That is their guitar amp version of the Dynaco 470. I think it was in an old RHinson thread that you'll find who sorted out the specifications that we've come to embrace as "The Rocket OPT" and is the HTS-8093-1.... probably could still be found with some good search skills here on the TAG forum. I'll have to look up the notes to get it exactly right but I believe it was something like following the Dynaco wind protocol but using M19 steel rather than M6. I think Phil's words were "we did that to put a little hair on it".

Several guys have built the Rocket using the real Dynacos and various clones and all the reports seem to be good. There is one master builder that frequents the trainwreck pages that uses the Dynacos in Liverpool builds and swears by them as the best LP tranny you can get. It has also been used in a couple builds of my "Rockster" (Octal Rocket) and again the reviews have been quite good.

Dynaco clones are pretty expensive options compared to the Stancor clones but compared to a Mercury Magnetics tranny, they are not bad at all. For my own Rocket builds I have a growing fondness for the Edcor products. They look a lot like a Stancor clone but with a high grade fit and finish and they sound extremely good.

rj

[talbany]

Debug error!!

[talbany]

I have used both Mercury Mag's A470 Clone and the real deal (Posted below) in 3 different amps now..
First I much prefer the real deal over the MM Axiom..Perhaps the unique winding pattern Dynaco design or the type alloy mixture in the M6 of the time or could be the iron I received of the real deal was seasoned (Which I prefer btw) or all of these things.. The harmonic content and overtones the real deal produce are really quite amazing.. After finishing the JTM loaded w/original 470 iron I did a A/B comparison with a 1983 JMP 50 watt/ all original loaded with 6550's just last night with several players I know that have wonderful ears..
Both amps generated the classic Marshall tone in spades.. The two in your face right away noticable differences were the Dynaco delivered a wider bandwidth even though the JMP had 6550's and the JTM had KT-77's (That was a in and of itself) the other one were the increased overtones were clearly audible to everyone in the room...I know I am comparing 2 different output transformers here but perhaps this would be useful to those experimenting with replacement Marshall iron in their wrecks..
So far I've built 2 Express's and now the JTM using seasoned Dynaco 470 iron and hear the overtone Phenomenon in all but this last set loaded in the JTM is real noticeable..
Personally if I were to clone these transformers I would want to get as close as possible to the originals and certainly not change the M6 Specs for the sake of adding some hair..Just me!!

Guitars used
PRS's
Strat's
Les Paul's and various LP copies
Cab Used
Original Basket weave 1960 Marshall 4X12 loaded origional G12H 30w Greenbacks..


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..

I know there are a zillion variables here at work we could discuss all day.. The examples taken were of only several amps..Used iron can also be hit or miss as well..However so far in my experimenting with the old 470 iron this seems to be the common thread that runs through the several I have tried..Take it or leave the opinion!!
Anyone else have the same or different opinion I would love to hear it..

From my old Dynaco catalog the ratings mean:
70 Watts "Undistorted power 30 cps to 15kc"
35 Watts "Undistorted power 20 cps to 20kc"
For those who are wondering cps = cycles per second = Hz in modern speak.
Hope This Helps!!

Tony

[ToneMerc]

I have the notes from Phil at Heyboer and he gives me some of the details on the HTS-8093-1. That is their guitar amp version of the Dynaco 470. I think it was in an old RHinson thread that you'll find who sorted out the specifications that we've come to embrace as "The Rocket OPT" and is the HTS-8093-1.... probably could still be found with some good search skills here on the TAG forum. I'll have to look up the notes to get it exactly right but I believe it was something like following the Dynaco wind protocol but using M19 steel rather than M6. I think Phil's words were "we did that to put a little hair on it".

Several guys have built the Rocket using the real Dynacos and various clones and all the reports seem to be good. There is one master builder that frequents the trainwreck pages that uses the Dynacos in Liverpool builds and swears by them as the best LP tranny you can get. It has also been used in a couple builds of my "Rockster" (Octal Rocket) and again the reviews have been quite good.

Dynaco clones are pretty expensive options compared to the Stancor clones but compared to a Mercury Magnetics tranny, they are not bad at all. For my own Rocket builds I have a growing fondness for the Edcor products. They look a lot like a Stancor clone but with a high grade fit and finish and they sound extremely good.

rj

RJ, it's my understanding from a rather detailed explanation from Phil that the HTS-8093-1 "guitar version" does not have the same winding pattern as the Dynaco 470. It has different steel and a different (less labor intensive aka cheaper) winding pattern.

Matter of fact, the price he quoted me for dead nuts clone minus the UL taps was about $45 higher than the HTS-8093.

TM

[rhinson]

I have the notes from Phil at Heyboer and he gives me some of the details on the HTS-8093-1. That is their guitar amp version of the Dynaco 470. I think it was in an old RHinson thread that you'll find who sorted out the specifications that we've come to embrace as "The Rocket OPT" and is the HTS-8093-1.... probably could still be found with some good search skills here on the TAG forum. I'll have to look up the notes to get it exactly right but I believe it was something like following the Dynaco wind protocol but using M19 steel rather than M6. I think Phil's words were "we did that to put a little hair on it".

Several guys have built the Rocket using the real Dynacos and various clones and all the reports seem to be good. There is one master builder that frequents the trainwreck pages that uses the Dynacos in Liverpool builds and swears by them as the best LP tranny you can get. It has also been used in a couple builds of my "Rockster" (Octal Rocket) and again the reviews have been quite good.

Dynaco clones are pretty expensive options compared to the Stancor clones but compared to a Mercury Magnetics tranny, they are not bad at all. For my own Rocket builds I have a growing fondness for the Edcor products. They look a lot like a Stancor clone but with a high grade fit and finish and they sound extremely good.

rj

RJ, it's my understanding from a rather detailed explanation from Phil that the HTS-8093-1 "guitar version" does not have the same winding pattern as the Dynaco 470. It has different steel and a different (less labor intensive aka cheaper) winding pattern.

Matter of fact, the price he quoted me for dead nuts clone minus the UL taps was about $45 higher than the HTS-8093.

TM

the hts 8093-1 was the one that i had done several years back based on the knowledge we had at the time. phil considers it "guitar" because i had it made with m19 instead of m6-----that doesn't matter---you can have it made with any steel you like based on your taste. it's not true the winding pattern is less labor intensive---it is MORE labor intensive---it has seven splits (as suggested by dave funk from his knowledge of ken's mods to the original a470 pattern) instead of the normal 5 (designed by david hafler, btw.). he knows this as i was the one at the time that told him how i wanted the change in the pattern to go after he gave me the stock winding geometry. rh

[rhinson]

I have the notes from Phil at Heyboer and he gives me some of the details on the HTS-8093-1. That is their guitar amp version of the Dynaco 470. I think it was in an old RHinson thread that you'll find who sorted out the specifications that we've come to embrace as "The Rocket OPT" and is the HTS-8093-1.... probably could still be found with some good search skills here on the TAG forum. I'll have to look up the notes to get it exactly right but I believe it was something like following the Dynaco wind protocol but using M19 steel rather than M6. I think Phil's words were "we did that to put a little hair on it".

Several guys have built the Rocket using the real Dynacos and various clones and all the reports seem to be good. There is one master builder that frequents the trainwreck pages that uses the Dynacos in Liverpool builds and swears by them as the best LP tranny you can get. It has also been used in a couple builds of my "Rockster" (Octal Rocket) and again the reviews have been quite good.

Dynaco clones are pretty expensive options compared to the Stancor clones but compared to a Mercury Magnetics tranny, they are not bad at all. For my own Rocket builds I have a growing fondness for the Edcor products. They look a lot like a Stancor clone but with a high grade fit and finish and they sound extremely good.

rj

RJ, it's my understanding from a rather detailed explanation from Phil that the HTS-8093-1 "guitar version" does not have the same winding pattern as the Dynaco 470. It has different steel and a different (less labor intensive aka cheaper) winding pattern.

Matter of fact, the price he quoted me for dead nuts clone minus the UL taps was about $45 higher than the HTS-8093.

TM

debug mode when i posted

[rhinson]

I have the notes from Phil at Heyboer and he gives me some of the details on the HTS-8093-1. That is their guitar amp version of the Dynaco 470. I think it was in an old RHinson thread that you'll find who sorted out the specifications that we've come to embrace as "The Rocket OPT" and is the HTS-8093-1.... probably could still be found with some good search skills here on the TAG forum. I'll have to look up the notes to get it exactly right but I believe it was something like following the Dynaco wind protocol but using M19 steel rather than M6. I think Phil's words were "we did that to put a little hair on it".

Several guys have built the Rocket using the real Dynacos and various clones and all the reports seem to be good. There is one master builder that frequents the trainwreck pages that uses the Dynacos in Liverpool builds and swears by them as the best LP tranny you can get. It has also been used in a couple builds of my "Rockster" (Octal Rocket) and again the reviews have been quite good.

Dynaco clones are pretty expensive options compared to the Stancor clones but compared to a Mercury Magnetics tranny, they are not bad at all. For my own Rocket builds I have a growing fondness for the Edcor products. They look a lot like a Stancor clone but with a high grade fit and finish and they sound extremely good.

rj

RJ, it's my understanding from a rather detailed explanation from Phil that the HTS-8093-1 "guitar version" does not have the same winding pattern as the Dynaco 470. It has different steel and a different (less labor intensive aka cheaper) winding pattern.

Matter of fact, the price he quoted me for dead nuts clone minus the UL taps was about $45 higher than the HTS-8093.

TM

debug mode when i posted

[Allynmey]

RHinson had some made a while ago at Heyboer and they were very good sounding. I had them made at Pacific with proper steel and they sound killer. They are based on The dynaco with a few changes.

[Bickster]

Guys,
How about Sunn OT's? They started out as Dynakits till they found out the OEM for dynaco. Thanks.

Bob

[redshark]

RHinson had some made a while ago at Heyboer and they were very good sounding. I had them made at Pacific with proper steel and they sound killer. They are based on The dynaco with a few changes.

Yes the pacifics sound killer in my rocket...Thanks Allyn!!

[rdjones]

Here's a recent (extensive) rebuild of an ultralinear Sunn Solarus.

It's the only amp I can recall where the output transformer is larger than the power. (that's the power on the right behind the power switches)
I replaced the unobtainium Dynaco cap can with a Deluxe pan that covers some F&Ts and there's 2 600V Atoms inside.
The chassis and transformers were badly rusted and got a fairly ghetto silver metallic on the chassis. The transformers got a bit more attention with an acid dip for the bells and Rustoleum satin black.

This is not the A470 but a larger OEM model, possibly the A431.


RedDog

[M Fowler]

I was looking at Mercury transformers today and see they offer some Dynclone and Stancor transformer replacements.

Mark