Thanks for the input but their was no rms rating on the amplifer. i got a a square transfromer aswell in the same amplifier with yellow/green wire. The black and red which goes to the speaker output (100volt line).
Does the amp do low impedance (2,4,8 ohms) as well as 100 volt line? For 100V line, it could literally be anything because the transformer will match the amp to the speaker(s). For low impedance output we can make a pretty good guess from the supply voltages and the # of output transistors.
well i do know it had 6 toshiba transistors maybe this will help estimate what the rms rating could be.
the two channel gainclone works on 25 to 30 volt my toriod gives out 60 volt so if make a a four channel gainclone that should be okay right.
No. The power supply is way too high for any kind of Gainclone. Also you will not be able to drive 4 ohm loads bridged with a Gainclone chip.
The circuit that springs to mind that would be ideal here is Quasi's N-BIP300, but it doesn't have VI limiting.
PA amps, especially if you play bass, need to have plenty of power in reserve and need to be able to drive heavy loads. This is not the realm of the Gainclone, which are meant for low-power Hi-Fi apps.
The circuit that springs to mind that would be ideal here is Quasi's N-BIP300, but it doesn't have VI limiting.
PA amps, especially if you play bass, need to have plenty of power in reserve and need to be able to drive heavy loads. This is not the realm of the Gainclone, which are meant for low-power Hi-Fi apps.
its looks interesting circuit but am a novice and would like to start from gainclones looks like going to have sell the toriod off on ebay and now i will test the square transformer see what voltage comming from that hopefully i get my new auto ranging multimeter from the post today.
yes got my multimeter today it goes by the name precison gold n56fu auto range sold by maplin compared to my last multimeter this is huge looks the kind the gas meter guy has.
Why bother to sell it off? If you're going to start with a gainclone, then go ahead - but I wouldn't get rid of the toroid if you're just going to end up turning around and buying a new one later. Save it for a Leach, a Quasi, or a DX.
Gainclones are cheap to build epecially if you don't buy into all the pseudo-science that seems to go into them. Don't go putting a bunch of expensive parts into it if you're just using it to get up the learning curve.
Gainclones are cheap to build epecially if you don't buy into all the pseudo-science that seems to go into them. Don't go putting a bunch of expensive parts into it if you're just using it to get up the learning curve.
i dont want to build leach and others as they quite complicated for me. yes i would like to build gainclone as a learning curve i wont be spending money on stupid components such black gate and all the silver wire etc i just want to build it to get sound and be proud of it. after this move up a step bit by bit. if i sell the toriod off i can buy another one that will match the gainclone with the money from the larger toroid. i still will have the very large square transformer left. i could sell that off to pay for the pcb modules and components.
If there is any chance this hobby bug might bite you, I would hang on to that tranny for the future... copper and therefor transformers, are just getting more expensive...
If you look at the date that I registered on this site, you will see it is not a million years ago.. back then I probably knew as much as you do now, but with a bit of sticking it out, I am now pretty independant when it comes to laying out and feel up to building just about any of the amps I see on this site, appart from the digital stuff... and even there I have constructed a L/C meter with a nice LCD display, probably 6 months into the hobby.
The only thing holding me up is resources, things like transformers and heatsinks.. transistors are relatively cheap... you will seldomly need to spend even $10 for a channel's transistors.
If you look at the date that I registered on this site, you will see it is not a million years ago.. back then I probably knew as much as you do now, but with a bit of sticking it out, I am now pretty independant when it comes to laying out and feel up to building just about any of the amps I see on this site, appart from the digital stuff... and even there I have constructed a L/C meter with a nice LCD display, probably 6 months into the hobby.
The only thing holding me up is resources, things like transformers and heatsinks.. transistors are relatively cheap... you will seldomly need to spend even $10 for a channel's transistors.
here is a quality picture of the large square transformer very heavy.
http://img186.imageshack.us/my.php?image=squaretrasnformerzm5.jpg
http://img186.imageshack.us/my.php?image=squaretrasnformerzm5.jpg
joka22 said:
Now that might be worth E-baying - line-matching transformers aren't all that common and unless you're doing constant-voltage PA installs they won't find much use otherwise. Might get enough out of that to buy a couple of 25.2V/2A surplus trafos for the gainclone.
BTW - the banner ads on your image hosting site are causing trouble with the PC-police filters here at work. Let me guess - probably has nothing to do with transformers.....
i just weighed it comes to 1 stone convert it to kilo gram = 6.3 kg.
no writing on it or specification label but build solid.
no writing on it or specification label but build solid.
anyway it is listed on ebay now if any one is interested do contact me. i might swap it for a decent multimeter, the condition dont matter as long as it works cos the true rms i bought damn it was faulty odd readings definite damaged. The yellow cheap one i used to have, was miles better than this multimeter i just recently got oh well time to contact the seller and ask for refund.
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