|Joseph Noci 1||25/08/2019 07:28:16|
|543 forum posts|
Very Nice Neil! And with 'improvements'!
Am busy trying to repair a 4KW Phonic stereo amp at the moment...All transistors, some FET's, no IC's.
Uses split supply rails as usual, but dual rail, ±55volt and ±120volt. The output stage has 16 transistors - 8NPN and 8PNP in parallel. These receive the ±55 rail when running below 1KW / 4ohms and there are some big FETs that then switch the 55volt rail out and the 120volt rails smoothly in..gives almost 4KW into 2 ohms...
13 Transistors in the input stages, 4 long tailed pairs..and 12 transistors in the output stages, excluding the 16 power output tranny's.
No scoundrels way out on this one..
We also have tons of mica here - literally mountains of it. Maybe that's why it is often dull and grey here in Swakop...Any light entering is trapped inside sheets of Mica and can never leave - out own Hotel California for light..
|XD 351||25/08/2019 08:42:48|
1356 forum posts
So now that you have it fixed will Stub be playing a few licks on YouTube?
|Nicholas Farr||25/08/2019 12:39:52|
1992 forum posts
Hi Neil, tut! tut!, fancy getting Paul's name misspelt. Threw me there for a moment, good job you got Winfield's one right.
Glad you got it fixed anyway.
P. S. sorry I couldn't resist a little banter.
Edited By Nicholas Farr on 25/08/2019 12:49:15
|Neil Wyatt||25/08/2019 14:05:06|
16655 forum posts
Sounds fun... and that's why you have such amazing night skies
|Neil Wyatt||25/08/2019 14:06:46|
16655 forum posts
|duncan webster||25/08/2019 17:49:18|
2255 forum posts
Don't give up the day job!
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.