WELCOME!!

[Old cart]

OK Just a quick update, watch this put a smile then a frown on Ivconics face (lol).

I've gone for low noise OP series op amps with 0.9nV/RootHz noise levels and a 75MHz response, they are available in DIP and I'm now aiming at a double sided PTH board (smiles).

The Op amps are $6.35 per pop and I hope they are available in Bulgaria (frowns).
this.
See, told you (look carefully at your monitor, you can see him cursing me again) ROFLMAO - Sorry Brother ;-)

I really have tried. Mind you looking at the Amplifier thread, this might end up being a totally discrete design, I mean that's not such a bad thing right?

Old Cart, ALL comments are welcome, or I'd be sitting at home doing this by myself. I've been on this forum for eons now and it's time I gave something back.

I like that idea, it's difficult to implement and I have amin rights for this thread so PLEASE don't be offended if a post get's deleted of edited and intergated with someone elses. I want to TRY tokeep this main thread clean and concise.

Sean sorry to hear this. I don't know what has suddenly soured you but I certainly hope things are well in your life.

[Polymer]

I just found this thread a few days ago and was wondering why there was nothing new for a year or so.

Your points made at the beginning of this thread about making the Surf PI more robust and better had me excited.

By the way, I don't have any shops where I can buy proper components, so I order abroad and will not complain about it or compromise on functionality & stability.

George was right about the managing of this being a challenge. Hell, I wish it wasn't so.


Anyway, I'm sad about this project ending.

With my best wishes, Polymer

[Sean_Goddard]

I am going to TRY to resurrect this project but in mainly ORIGINAL format.

U103 may NOT be needed so can be bridged as long as the drive on Q101 & Q103 take the TP on the collectors to GND or VCC (or as near as possible) to actively hard drive Q102.

R103 need tweaking (use a pot until you get the highest NON AVALANCHE voltage on the Drain of Q102).

S1 is a push to BREAK type, not push to MAKE. Lastly, leave the output of U1.3 open circuit rather than connecting it back tothe input and control (cut track) and D1 may need to be link rather than a diode.