IIRC, the first ThunderFunks were built using leftover parts from BH-420s.
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Amp Guts Photos - Official Thread - Lets see those pics
- Thread starter svtb15
- Start date
IIRC, the first ThunderFunks were built using leftover parts from BH-420s.
There are some big differences with the Eden VT300 and the Sadowsky SA200. They have different preamps designed by David and Roger using a different approach. The Eden has two variable gain stages where the Sadowsky has three which makes for different ways to overdrive the tubes. The Eden has a compressor and overdrive whereas the Sadowsky accomplishes them the "old-fashioned" way without a footswitch.
The tone centers are different and the Eden EQ is active cut/boost and quite powerful whereas the Sadowsky middle EQ frequencies are passive and cut only but the lowest and highest frequencies are active cut/boost. The Eden uses 6650 tubes and the Sadowsky has EL34s. So, there's quite a lot of tone shaping differences. In fact, the only similarities may be what you see, the chassis, toroidal transformers and (maybe) the power supplies.
They can both get a classic tube sound, of course, and attempt to address some of the complaints of an all-tube head. Until they start to break up, they are as clean and tight as any SS amp. I don't think you could use the word, "muddy," for either as the high frequencies seem to go on forever and I don't use tweeters. The Sadowsky seems to incorporate the nuances of several classic all-tube amps (Fender and Marshall, possibly Hiwatt, come to mind) whereas the VT300 has a distinct Eden "sound" to it.
Gale
The tone centers are different and the Eden EQ is active cut/boost and quite powerful whereas the Sadowsky middle EQ frequencies are passive and cut only but the lowest and highest frequencies are active cut/boost. The Eden uses 6650 tubes and the Sadowsky has EL34s. So, there's quite a lot of tone shaping differences. In fact, the only similarities may be what you see, the chassis, toroidal transformers and (maybe) the power supplies.
They can both get a classic tube sound, of course, and attempt to address some of the complaints of an all-tube head. Until they start to break up, they are as clean and tight as any SS amp. I don't think you could use the word, "muddy," for either as the high frequencies seem to go on forever and I don't use tweeters. The Sadowsky seems to incorporate the nuances of several classic all-tube amps (Fender and Marshall, possibly Hiwatt, come to mind) whereas the VT300 has a distinct Eden "sound" to it.
Gale
- Mar 22, 2004
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- I play it all. Whatever works for the gig. Q+
yes it does look like the AMP and the Thunderfunk.. from what i have read on TB they are all related.. a great design all around IMO. cool pics too
My Eden VT-.40, pics compliments of previous owner.
Notice the similarity to the AMP BH420 in the power amp section (both designed by Russ Allee).
Cheers,
Duff2
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
yes.. i read that too/// what a cool history that design has... well it works and it works well
Where did the output cap go?
Also, gotta love a graphic EQ where the highest band is 400 Hz!!!
I have always loved those amps from the time I first touched one in the music store (Bay Music Saginaw, MI) back in about 1974!!!
Those amps sound sweet through an Ampeg 8x10 too. Too bad I didn't figure that out until I was in the process of packing them all up for shipping (back in 2002 or so).
All the electrolytic caps have been replaced, even on the PCB. It's hard to see in the photo but the remaining caps have tape around them to try to get them to fit in the hoops. The technology has just gotten better, at least I hope that is the answer
OK, but it looks like the largest clamp is empty. IIRC, that's where the one in series with the amp's output (between the output transistors and the speaker jack) went. It blocks DC from reaching (and ruining) the speakers. I presume that more modern amp designs control the DC offset better and don't need one.
Does the amp still give you a big thump through the speakers when you turn it on?
Chef
In Memoriam
Here is my former Eden WT1205
Here is my Eden WT405, best amp I have ever owned.
Here is my Eden WT405, best amp I have ever owned.
Chef
In Memoriam
It's intersting to see how different amp makers design their amps with their own "personality" (If you like)
Like Eden seem to love their connectors and multi-board system.
Would love to see a guts view of the GK fusion 550.
Like Eden seem to love their connectors and multi-board system.
Would love to see a guts view of the GK fusion 550.
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
I love the way that amp is laid out inside... they pack alot in there..
Here is my former Eden WT1205
Here is my Eden WT405, best amp I have ever owned.
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
I do I do.
I have an old rusted Dynaco power amp that has been a door stop in my garage for a few years... I need to get some dusty pics of it later... and post them
I have an old rusted Dynaco power amp that has been a door stop in my garage for a few years... I need to get some dusty pics of it later... and post them
