Yes, swap R10 and R12 but not R37.
To allow the resistors to easily plug in and out cut up a machined-pin DIP socket like the ones Mill Max makes. Solder the individual pins to the board and cut and form the resistor leads to plug in. PRP 1/2W resistors have a 0.025" lead diameter and should just fit in a DIP socket pin. I have no data on Shinkoh resistors so you should check if they can plug in to the socket. There will always be questions about the validity of any comparison using switches and long wires to connect the switches to the board.
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I think I have it figured out now, what I was confused about was the way some books explain secondary series voltage.
Attachments
Yes you are absolutely correct, the diagram I posted was a copy from an instructor, as I read it, posted it, it just didn't click, I knew something wasn't right, finally now I understand it, thanks you all who helped.
Thank you.
Thank you.
Hey guys,
I'm confused on how to wire my transformer now also. Could you tell me what wire goes where based on the data sheet of my transformer? It's in the link below. I use one transformer for each channel.
http://www.amplimo.nl/download/080xx.pdf
My best guess is that I have to yellow and grey to PGND, blue to AC1 and red to AC2. Can one of you confirm this?
Thanks a lot! 🙂
Cheers!
I'm confused on how to wire my transformer now also. Could you tell me what wire goes where based on the data sheet of my transformer? It's in the link below. I use one transformer for each channel.
http://www.amplimo.nl/download/080xx.pdf
My best guess is that I have to yellow and grey to PGND, blue to AC1 and red to AC2. Can one of you confirm this?
Thanks a lot! 🙂
Cheers!
It looks like you want to follow the "serial operation to
double the secondary voltage" from you data sheet. Combine Yellow and Blue and use that as PGND, then use Red as AC1 and Grey as AC2.
This will give you the big voltage difference between AC1 and AC2 whereas the way you suggested would have a zero voltage difference between AC1 and AC2.
Yup.
This is very helpful:
Standard wiring diagrams for transformers. Antrim Transformers, Northern Ireland.
Cheers
Jon
This is very helpful:
Standard wiring diagrams for transformers. Antrim Transformers, Northern Ireland.
Cheers
Jon
Transformer wiring
I'm new to this hobby... on my third build, but I managed to hook up the transformer for my last gain clone OK. All you need to make sure you hook up your transformer right is the data sheet or schematic. I found this one in the catalogue for my transformer manufacturer (attached .pdf). Colours vary by maker and transformer type of course.
Also, a little help like this link Wiring Transformers
(Site design, content and images © Daniel Clarke 2004)
This link cross references to the Antrim transformer link posted by Jon a couple of posts back... looks quite helpful though some of the secondary winding wiring notes are irrelevant for us.
If you are at all unsure, pick someone in this GB who seems knowledgeable, experienced (not me) and approachable and PM to ask for help (including as much relevant information as possible). Worst that can happen is they say no.
Bill
I'm new to this hobby... on my third build, but I managed to hook up the transformer for my last gain clone OK. All you need to make sure you hook up your transformer right is the data sheet or schematic. I found this one in the catalogue for my transformer manufacturer (attached .pdf). Colours vary by maker and transformer type of course.
Also, a little help like this link Wiring Transformers
(Site design, content and images © Daniel Clarke 2004)
This link cross references to the Antrim transformer link posted by Jon a couple of posts back... looks quite helpful though some of the secondary winding wiring notes are irrelevant for us.
If you are at all unsure, pick someone in this GB who seems knowledgeable, experienced (not me) and approachable and PM to ask for help (including as much relevant information as possible). Worst that can happen is they say no.
Bill
Uriah,
I haven't received my order yet. Just checking in to make sure it's not lost in transit...
Par
I haven't received my order yet. Just checking in to make sure it's not lost in transit...
Par
Dim Bulb Tester
Using two AN-2225 25v 200 VA transformers and one AN-0120 20v 10 VA
What watt bulb do I need for this load? If this calculation is correct, I would need a 300Watt bulb?
Popup calculator
410VA 287 Watts 3.417 Amps
Please explain, bulb will light if no short and burn dim, if bulb glows brightly
indicates a short?
Using two AN-2225 25v 200 VA transformers and one AN-0120 20v 10 VA
What watt bulb do I need for this load? If this calculation is correct, I would need a 300Watt bulb?
Popup calculator
410VA 287 Watts 3.417 Amps
Please explain, bulb will light if no short and burn dim, if bulb glows brightly
indicates a short?
I usually start with a 40W bulb on the UK's 240Vac supply.
can swap in stages up to 150W if high quiescent current flows.
can swap in stages up to 150W if high quiescent current flows.
Yup, I use 40W here too.
When you flip the switch, your bulb will flash as the reservoir capacitors in the amp charge. It'll then dim right down. I've tried playing music with it connected, and it's an interesting correlation between current draw (and bulb glowing brighter) and music volume. Sometimes, those beefy, underlying tones draw much more than you'd imagine....
When you flip the switch, your bulb will flash as the reservoir capacitors in the amp charge. It'll then dim right down. I've tried playing music with it connected, and it's an interesting correlation between current draw (and bulb glowing brighter) and music volume. Sometimes, those beefy, underlying tones draw much more than you'd imagine....
3886 on +-37Vdc
If I leave the 40W bulb in circuit, I can measure the modulation on the PSU rails. I cannot see the bulb glow at all.
If I turn the volume up to clipping levels, then I see some pulsing of the very dim glow of the filament.
If I leave the 40W bulb in circuit, I can measure the modulation on the PSU rails. I cannot see the bulb glow at all.
If I turn the volume up to clipping levels, then I see some pulsing of the very dim glow of the filament.
That's right. If it glows brightly, and stays bright, power off QUICK and then start looking for the reason for the large current draw (short, faulty component etc)
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