Here's an amp I built before I knew what I was doing!
An externally hosted image should be here but it was not working when we last tested it.
Here's an amp I built before I knew what I was doing!
When people ask me what do do for a first project I propose something simple like an ECL82 or EL84 in SE ........ or an 100W OTL...
TubeHead Johnny said:Here's an amp I built before I knew what I was doing!
If that is what you were capable of before you "knew what you were doing", what are you doing now? Very impressive piece of work! (I will leave well alone and not touch on the pro/anti tone control bebate!)
Craig405 said:I recognise some Hammond 1650R's up there! I take it they are good for Hifi then!
Yes, you're right. I wasn't going to use them originally but I had had Heybohr custom make me some TO-350s. They screwed them up so I got the 1650Rs because I was tired waiting. But I am VERY PLEASED with them! They do a great job...
Rodango said:
Yes, you're right. I wasn't going to use them originally but I had had Heybohr custom make me some TO-350s. They screwed them up so I got the 1650Rs because I was tired waiting. But I am VERY PLEASED with them! They do a great job...
OK guys, I can hear some of you still laughing out there... "He said no expense spared and then he gets Hammond outputs?! Oh that's too funny! Ha ha ha!"
OK.. Agreed.. The outputs are the only things I skimped on. BUT I'm here to let you know I just redeemed myself and ordered a set of Hashimotos.
So in a couple weeks, we'll see how they 'transform' the AAI!!
Here's a pic of an old diy SE amp I purchased from ebay, which has recently been regutted and modified by Earle Weston (well known valve amp maker here in Australia). It was using EL34's, but Earle has installed 6L6G's which look great!
An externally hosted image should be here but it was not working when we last tested it.
Chinese Tennis Ball 6SN7s
Has everyone had a change to audition the tennis ball 6SN7s coming out of China? Well they used to come from there until they ran out. What's everyone think about them? I think they sound rather good. Not unlike an NOS Sylvania. Anyway here's a photo of one in my AAI.
Has everyone had a change to audition the tennis ball 6SN7s coming out of China? Well they used to come from there until they ran out. What's everyone think about them? I think they sound rather good. Not unlike an NOS Sylvania. Anyway here's a photo of one in my AAI.
An externally hosted image should be here but it was not working when we last tested it.
The Blunderbuss
Here's a really great hand-made amp I bought off ebay. Perhaps some of you recognize the trademark mirror and know who the builder is. I modded it quite a bit including re-doing the power, adding gold connectors, Sonicaps, different cathode resistors and bypass caps, tube shields, NOS Dynaco A-470 outputs and Brazilian Ebony endpieces.
Here's a really great hand-made amp I bought off ebay. Perhaps some of you recognize the trademark mirror and know who the builder is. I modded it quite a bit including re-doing the power, adding gold connectors, Sonicaps, different cathode resistors and bypass caps, tube shields, NOS Dynaco A-470 outputs and Brazilian Ebony endpieces.
An externally hosted image should be here but it was not working when we last tested it.
Hi Rodango
What tubes do you use in this amp ?
Dynaco A-470 is wired for 35W, 20-20kHz.
If you push it with more effekt, frequency drop dramaticly in both the low and high frequencies.
The A-430 transformer were wired (with its doubble weight) for 60W, 20-20kHz. I use the capsuled ones myself for my klassA amp in Post #1976.
Be carefull.
What tubes do you use in this amp ?
Dynaco A-470 is wired for 35W, 20-20kHz.
If you push it with more effekt, frequency drop dramaticly in both the low and high frequencies.
The A-430 transformer were wired (with its doubble weight) for 60W, 20-20kHz. I use the capsuled ones myself for my klassA amp in Post #1976.
Be carefull.
Rodango
Don´t misanderstand me. The A-470 is a very good transformer, but its built in the first case for use with EL34 and 6L6 etc.
With A-430 or Hammond 1650R, you can go with tubes like 6550, KT88, KT90 and KT100. And you are on the safe side, to get the best sound and reliability out of it.
Don´t misanderstand me. The A-470 is a very good transformer, but its built in the first case for use with EL34 and 6L6 etc.
With A-430 or Hammond 1650R, you can go with tubes like 6550, KT88, KT90 and KT100. And you are on the safe side, to get the best sound and reliability out of it.
EICO HF87 Rebuild - (Pics)
EICO HF87 Rebuild.... This is not a faithful restoration project, as the Olive Drab of the original unit just isn't my style. I ditched the original schematic and went with my own. The amp sounds amazing... it's one of the best of the oldies.
The wonderful original EICO output transformers, stripped for painting.
The HF-87 chassis stripped and sanded down to bare metal.
A thick glaze of copper paint applied to the chassis.
The EICO transformers back together and ready to place on the chassis.
Transformers in place on the HF87 chassis.
Starting to wire the outputs.
A shot of the back of the amp.
Bottom panel.
The final amp driving a pair of Monitor Audio RS1 Silvers.
The final amp driving a pair of Monitor Audio RS1 Silvers.
EL34s in the dark...
EICO HF87 Rebuild.... This is not a faithful restoration project, as the Olive Drab of the original unit just isn't my style. I ditched the original schematic and went with my own. The amp sounds amazing... it's one of the best of the oldies.
The wonderful original EICO output transformers, stripped for painting.
An externally hosted image should be here but it was not working when we last tested it.
The HF-87 chassis stripped and sanded down to bare metal.
An externally hosted image should be here but it was not working when we last tested it.
A thick glaze of copper paint applied to the chassis.
An externally hosted image should be here but it was not working when we last tested it.
The EICO transformers back together and ready to place on the chassis.
An externally hosted image should be here but it was not working when we last tested it.
Transformers in place on the HF87 chassis.
An externally hosted image should be here but it was not working when we last tested it.
Starting to wire the outputs.
An externally hosted image should be here but it was not working when we last tested it.
A shot of the back of the amp.
An externally hosted image should be here but it was not working when we last tested it.
Bottom panel.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The final amp driving a pair of Monitor Audio RS1 Silvers.
An externally hosted image should be here but it was not working when we last tested it.
The final amp driving a pair of Monitor Audio RS1 Silvers.
An externally hosted image should be here but it was not working when we last tested it.
EL34s in the dark...
An externally hosted image should be here but it was not working when we last tested it.
Hi guys'n girls (if there are any )
Here's my small contribution to the gallery.
My RIAA called Rialto, together with my Puccini, a downsized Maynard 25-8, and a passive preamp called Verdi
The circuit is a copy of the danish Tube Lab (from Fairman), from whome i got the diagram some years ago.
To my question on whether I could just get it for free he (Werner Scherrer-Tangen) just smiled and said that it was just the diagram.
Now, many years later, I understand what he meant
Here's my small contribution to the gallery.
My RIAA called Rialto, together with my Puccini, a downsized Maynard 25-8, and a passive preamp called Verdi
The circuit is a copy of the danish Tube Lab (from Fairman), from whome i got the diagram some years ago.
To my question on whether I could just get it for free he (Werner Scherrer-Tangen) just smiled and said that it was just the diagram.
Now, many years later, I understand what he meant
Attachments
pedroskova said:Thought I'd throw in my brother's 6sn7/300B P-P monoblock that is finally becoming a reality. It was built in partnership with an old friend of his. Chas(my brother) was responsible for the layout and construction of the chassis(machining, veneering,etc.,), while Mike designed and prototyped the circuit.
It's made of polished aluminum plate and veneered mdf, and has hundreds of hours put into the machining, etc., (for all four units). The transformer cover is fiberglass that was laminated over a mold and will have artwork applied.
Not your everyday amp.
Hey how you polished the aluminium? i tryed many times without luck
Hoffmeyer said:
You are a smiling happy man, what i can see.
Hej Ragnwald
Ja tack, mycket nöjd
(Yes thanks, very happy )
First valve-thing I've ever build, and it worked the first time
I am indeed a happy man.
Now I'm considering building the linestage too, and put it into my Verdi.
Just considering
Ragnwald said:
You are a smiling happy man, what i can see.
Ja tack, mycket nöjd
(Yes thanks, very happy )
First valve-thing I've ever build, and it worked the first time
I am indeed a happy man.
Now I'm considering building the linestage too, and put it into my Verdi.
Just considering
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