I don't know if this will make any difference, but once I got the idea into my head, I had to do it:
A few components are hanging off the bottom:
Still working on modifying the second NAP135 case and building some wiring....
Airlink do good transformers. I've used them in several builds. It might be worth opting to have an inter winding screen fitted.
Never one to stand still for long. Next step is the NCC300 voyager..as below.
I have quite a few options for the front end PSU caps but only up to 63v but I'm on the look out for some 100va ish 42-0-42 secondary transformers, finding off the shelf is a nono though. I have Les's 50-0-50 transformers which would supply 70v but am unsure if the regs would drop 20v. I have installed the TIP 'C's which are 100v devices.
Just seen Airlink do a 80 or 120va 42-0-42....
The pos and neg regs 'at set up' are + - 55v and drop to 50v under load in circuit.
Care to explain why you think this will be an improvement? I've found this thread to be nothing but a, "Hey, look at me!" thread until more people get to play in the sandbox
So you're saying that other people besides the chosen few will get build these in the future?Galvanic isolation...you may be right, there may not be any improvement. As stated, for the money I'll give it a go. Please take a look at my and others previous posts, we've included information that would help a future builder. And yes your quite right 'look at me' is spot on:- Isn't that whats social media about. But everyone here is looking at you.
So you're saying that other people besides the chosen few will get build these in the future?
So you're saying that other people besides the chosen few will get build these in the future?
My thanks to the guys for all the superb effort, I'm well pleased this project is
taking off.
I'm well advanced with a scheme for comverting the NAP135s and that was the main object of designing this board.
If there's sufficient interest, I might be persuaded to put together some kits for the 135s consisting of 2 X NCC300 PCB, 2 X SPM1 PCB, a set of small (sometimes hard-to-get) heatsinks for both boards and a few rare parts to enable home constructors to convert these popular amps .
The income from this would offset some of the investment there's been so far so I'd be grateful for the business.
Let me know what the team thinks.
This is a good thread, not showy at all and is very helpful to others, take no notice of the Troll