Search found 20 matches
- Sun Dec 16, 2018 9:12 pm
- Forum: Everyones Projects
- Topic: simple adaptive bias amplifier, finalized!
- Replies: 0
- Views: 5551
simple adaptive bias amplifier, finalized!
Hello Peep's. The following is the project that the electronics class were asked to present after the Autumn term, the beginner forum of this board contains some of the meanderings and prevarication that went on before my final design was settled. I'm posting this to save the confusion that I caused...
- Wed Nov 28, 2018 10:15 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: information needed about low power amp topology
I maintain that your original circuit would have virtually no standing polarising charge and the capacitor wouldn't lead a very happy life Yes, I agree, but after you have finished moving those goalposts, this is what I was questioning: You will therefore realize that the capacitor will spend half ...
- Wed Nov 28, 2018 12:42 am
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
more on that capacitor!
I must admit that I'm still a little unsure about the magic that the inductor performs in this circuit, and intend to ask to use the schools oscilloscope to look at what's going on either side of the output capacitor. I have my dads old oscilloscope, but it has its own capacitor issues, so, I can't ...
- Mon Nov 26, 2018 9:48 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Simple adaptive/sliding bias amplifier.... finalized.
OK, I was so convinced that I'd found the best solution to the amplifiers requirements that I emailed Guru Norman the circuit. Here's what he said: ....well done on the diagram Ami, that's very neat, however, I must point out a couple of mistakes. Firstly, for your current application this will be a...
- Mon Nov 26, 2018 9:40 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
- Mon Nov 26, 2018 1:48 am
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: Thanks guys!
Well peeps, I built it and it works :D And it's all good! :P So good that to do it justice in listening tests I'm feeding it with a program of music from the line out on my CD player, (instead of the crappy MW tuner), driving a "vintage" 7" elliptical probably from an old TV set that ...
- Fri Nov 23, 2018 11:59 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Project redux
....So peeps, I presented my work to Teach, in the sure and certain knowledge that I was going to be praised for not only being the first to finish the assignment, but also for the quality of my method exposition and practical skills. I was wrong. Very, very, wrong! :( My written work was criticised...
- Sat Sep 29, 2018 9:55 pm
- Forum: Valves
- Topic: PL36 Sweep Tube
- Replies: 2
- Views: 8466
Re: PL36 Sweep Tube
Hi there. Dad built a self split class A P/P with two of those. It ran on quite low HT. He used this circuit as inspiration http://www.b-kainka.de/roehren/Schaltung4.gif full article http://www.b-kainka.de/roehren/gegentakt.htm. (in German) I have Dad's notebook with details of his version in but no...
- Sun Sep 23, 2018 4:51 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Thanks guys!
Hello peeps! Thanks to a member here, who knows who they are ;) I was kindly sent two transformers that were for a small push pull transistor amplifier. The driver one was the most suitable as the sound from the output one was noticeably muffled, teach saying because it was "not gapped core&quo...
- Wed Sep 19, 2018 12:00 am
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: information needed about low power amp topology
Mike.
Full article Radio & Electronic Constructor June 1973. http://www.spontaflex.free-online.co.uk/
Ami.
- Tue Sep 18, 2018 10:19 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: information needed about low power amp topology
http://www.spontaflex.free-online.co.uk/slidingjunior/circuit.jpg http://livinginthepast-audioweb.co.uk/imagex/misc/like-button2.jpg There's a gent on another forum who won't be pressing your button Mike! Here's what he says of the, "sliding junior" circuit by sir Douglas Hall..... It's a...
- Tue Sep 18, 2018 8:45 pm
- Forum: New Users
- Topic: Hey there, I'm Ami!
- Replies: 9
- Views: 17220
Re: Hey there, I'm Ami!
Ami there are some really good technical people on this forum who will go out of their way to help you, I know as being none technical (in electronics but still an Engineer in another field) I have had lots of advice and help, so good luck with your continued education. :) Thanks Andy, that's sweet...
- Mon Sep 17, 2018 7:55 pm
- Forum: New Users
- Topic: Hey there, I'm Ami!
- Replies: 9
- Views: 17220
Re: Hey there, I'm Ami!
Refreshing to see a girl on any of the forums, welcome Ami enjoy your time here. Thanks Andy and all! People have already been so helpful, one day I hope to reciprocate, I find it odd that in my age group engineering interests is maybe 25% to 75% girls to boys but I've only noticed a few ladies on ...
- Mon Sep 17, 2018 12:01 pm
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: information needed about low power amp topology
Thanks Nick. I've a lot to learn
Luv, Ami.
Luv, Ami.
- Mon Sep 17, 2018 11:54 am
- Forum: Beginners
- Topic: information needed about low power amp topology
- Replies: 46
- Views: 35843
Re: information needed about low power amp topology
Looking on page 428 of this https://www.americanradiohistory.com/Archive-Radio-Constructor/70s/RC-1972-02.pdf Look like it was originally made by these http://www.repancobartlett.co.uk/index.html Maybe someone could email them and ask for specs for the TT56 Thanks Nick, I've sent an email to repanc...