When in Rome... "pal".Quote:
Originally Posted by Floyddroid
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When in Rome... "pal".Quote:
Originally Posted by Floyddroid
Oi - let's keep the vibe nice and friendly, guys!
Marco.
Thanks for the pictures. I tried to work out the circuit last night but it proved very difficult without being able to see the component side of the board and the tracks together. I failed miserably :doh:Quote:
Originally Posted by 337alant
I'm working on it and about 2/3rd's of the way there. I expect to post the diagram today. Indeed it is not easy!
I did ask before starting if anyone else is also planning to attempt it in order to avoid the prospect of two or more of us "wasting" hours on the same task...
Here yer go folks...
http://i1303.photobucket.com/albums/...psy7nindoo.jpg
Edit: C1,2,3,4 marked 10uF are 47uF
Nice one, Jez. Much appreciated! :thumbsup:
So when are you building one for us to listen to? ;)
Marco.
The design is better in terms of potential sound quality than I had assumed... but has it's issues and limitations...Quote:
Originally Posted by Marco
The ZTX transistors are not the original type of course but I put them in the diagram cos they would probably work pretty well in this application and are readily available. All values are as in original Lentek. Resistor etc for battery check led not shown.
I've no plans to build any as such but if anyone wants to commission one then I'll take the job of course. I would vastly prefer to supply just a tested board for people to put in their own casework. Various component types and values would be upgraded compared to a standard one, along similar lines to those modded by Nick. £80 delivered for board only.
The possibility of a "Lentek Head Amp; The Arkless Edition" is of course present.... with all sorts of improvements to the original. It's just a push pull common emitter amplifier at the end of the day and various compromises are present to make it a bit cheaper and allow the use of just the one battery. It should be possible to make one with some extra "house-keeping" circuitry and twin 9V batteries or mains PSU which would be considerably better than the original but at a much higher price etc..
I wonder how long it will take for a Chinese made clone at £7.50 to appear now? :D
That's reassuring, as I didn't think I was deaf :D;)Quote:
Originally Posted by Arkless Electronics
Limitations? Of course, as with any piece of hi-fi equipment, especially a budget design like that.
I like the idea of the twin battery thing, as it's something I've also contemplated recently, so might take you up on that :cool:Quote:
The possibility of a "Lentek Head Amp; The Arkless Edition" is of course present.... with all sorts of improvements to the original. It's just a push pull common emitter amplifier at the end of the day and various compromises are present to make it a bit cheaper and allow the use of just the one battery. It should be possible to make one with some extra "house-keeping" circuitry and twin 9V batteries or mains PSU which would be considerably better than the original but at a much higher price etc..
Marco.
The twin battery idea I'm talking about is 100% different to that which you are no doubt talking about and involves a complete redesign of the circuitry whilst keeping the basic topology. It would likely only be practical in a new Arkless version. However, there are reasons why twin batteries as you are probably talking about would also be an improvement yes.... if they will fit! A new on/off switch would have to be fitted as well.Quote:
Originally Posted by Marco