kevin gilmore Posted July 27, 2009 Report Posted July 27, 2009 OK, so a picture of the insides of guzziguys amp would help. Reason is that the one of the two companies probably used has different wiring colors on the transformer wires. Pictures of the area around the transformer. Also looking for transformer wires not used (like the 5v ct winding on the hammonds) I'm working with someone that is trying to fix tyson's amplifier right now. You betcha, mikhail fail all over the place. The B+ on that thing with 6bl7's is 500 volts. At 30ma. Into a 25 ohm load it puts out only 2.5 milliwatts before clipping. By the way, on that unit the output caps are running 50 volts over spec. On voltron's amp the spec on the output caps is 160 volts (pretty sure on this one) which means he should never EVER go more than 2 x 75 volt gas tubes (well 4 total). I'm pretty serious about this one. Otherwise the posibility of expensive headphones going poof...
justin Posted July 27, 2009 Report Posted July 27, 2009 On voltron's amp the spec on the output caps is 160 volts (pretty sure on this one) which means he should never EVER go more than 2 x 75 volt gas tubes (well 4 total). I'm pretty serious about this one. Otherwise the posibility of expensive headphones going poof... that's no problem, i know someone in the business of fixing R10s
n_maher Posted July 27, 2009 Report Posted July 27, 2009 OK, so a picture of the insides of guzziguys amp would help. Reason is that the one of the two companies probably used has different wiring colors on the transformer wires. Pictures of the area around the transformer. Also looking for transformer wires not used (like the 5v ct winding on the hammonds) Ken shot some internal pics of his amp for me which I'm sure he'll share as soon as he sees this. Also, I've found a second stock Extreme and when I asked the owner if he'd mind taking internal shots so we could see if it was the same primary-as-secondary nonsense he said he couldn't. All of the screws are so tight that the hex heads strip before they move. I offered to open it for him and explained why, he decided to retire the amp instead. What a shitty second half of 2009 SP owners have to look forward to.
guzziguy Posted July 27, 2009 Report Posted July 27, 2009 (edited) You just think that it is a plitron transformer because you have been told it is. Given the events of the recent couple of months, how do you really know unless you pop the cover and look. plitron transformers, every one i have ever seen going way back are all toroids and won't fit into the square box. So if you still have the 4 inch x 4 inch square box there is no way a plitron toroid is going to fit in there. If you have the round cover then there is a good chance you really have the right transformer. Then there is the issue of what particular model number it is. Here is a big hint. Nothing mikhail has ever done that i have seen so far has custom transformers, everything is a stock model. His line that he had the transformers custom made is pure bullshit. If the transformer runs so hot that you can't touch it after it has been on for an hour, it is likely that sooner or later the transformer will let go. When that happens a custom transformer is about $107. But then it ends up looking like mine does now instead of what it used to look like. I'll check the temperature tonight. With the Platinum Extremes, there is no 4"x4" box. Instead, there is a round transformer cover (probably part of the transformer itself) that has a height of 3.5" and a diameter of 6". You've actually seen pictures of the internals before as I've posted them here. However, here they are again: http://s128.photobucket.com/albums/p197/kmueller13/P1010169.jpg http://i128.photobucket.com/albums/p197/kmueller13/P1010171.jpg http://i128.photobucket.com/albums/p197/kmueller13/P1010172.jpg http://i128.photobucket.com/albums/p197/kmueller13/P1010174.jpg http://i128.photobucket.com/albums/p197/kmueller13/P1010176.jpg http://i128.photobucket.com/albums/p197/kmueller13/P1010178.jpg The issue with D5 is known. I'm hoping that it's due to me running 6528 tubes for a short period of time. It hasn't gotten any worse since I stopped. Of course, Mikhail ok'ed running those tubes for up to 3 hours at a time. D5 will be replaced soon. Edit: Oh yeah, while I can't see much of the transformer including a model number, I can see that Plitron's web addy on it. Edited July 27, 2009 by guzziguy
guzziguy Posted July 27, 2009 Report Posted July 27, 2009 What a shitty second half of 2009 SP owners have to look forward to. If Mikhail turned up shot, there wouldn't be enough policemen in the country to check out all the potential suspects.
guzziguy Posted July 27, 2009 Report Posted July 27, 2009 If the transformer runs so hot that you can't touch it after it has been on for an hour, it is likely that sooner or later the transformer will let go. I just had the amp idling (i.e. no music) for 1 hour. The transformer cover is absolutely cool to the touch. Do I need to redo the test with music playing?
kevin gilmore Posted July 27, 2009 Report Posted July 27, 2009 (edited) Well it looks like you are ok as you have the real thing. Maybe even custom. So you are fine although at some point you have to deal with the overheated resistor. As far as voltron and tyson, it turns out mikhail had it exactly backwards. For low impedance loads you want more current, not more voltage. Trouble with most and probably all of those is the 500 volt power supply rail. By the time you turn up the current on the output tubes for maximum power and linearity the regulator device is dishing out 30 watts. (60 watts in voltron's case) And clearly without any kind of heatsink that big, things are going to get very warm very fast. Edited July 27, 2009 by kevin gilmore
kevin gilmore Posted July 27, 2009 Report Posted July 27, 2009 You ever see a singlepower product leave the factory with heatsinks??? And not the ones that one guy put on his pencil amplifier to keep it from getting so hot it was able to boil water. 60 watts of heatsink is twice what you put on a dynahi No fear, i've found a cheap transformer that fixes most of that problem.
Dusty Chalk Posted July 27, 2009 Report Posted July 27, 2009 You could just watercool the whole thing.
kevin gilmore Posted July 27, 2009 Report Posted July 27, 2009 I did that with the Uberamp... Much better idea is Ethylene glycol. Then when you spring a leak, you really do have a fucking mess everywhere. Water and high voltage. Great idea... Did i mention that i'm using my extreme with an ipod and hd600's in the master bathroom. Seriously...
MASantos Posted July 27, 2009 Report Posted July 27, 2009 Did i mention that i'm using my extreme with an ipod and hd600's in the master bathroom. Seriously... T.M.I
Dusty Chalk Posted July 28, 2009 Report Posted July 28, 2009 Water and high voltage. Great idea...Well, by watercool, I meant liquid cool -- they have special non-conductive coolants to submerse one's entire PC in, I was thinking more along the lines of something like that. Albeit not seriously. The heatsinks weren't serious either.
Grahame Posted July 28, 2009 Report Posted July 28, 2009 Fluorinert - Wikipedia, the free encyclopedia FTW!
boomana Posted July 28, 2009 Report Posted July 28, 2009 Just catching up with this thread again. Congrats, Al on getting your amp back up and working. And to Steve.......
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now