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View Full Version : TWO-BOX and CA3035 integrated circuit.


Dale Seppa
04-02-2000, 12:05 AM
Carl and all:


Mr. Claus-Peter Schmid was kind enough to let me know that the CA3035 necessary for the two-box (T/R Locator) on Carl's Geogech Web Page is available from a company in England. He has communicated with them and they indicate they ARE available. They have a web sit at http://www.dialectronics.co.uk and the price of the CA3035 is US$10.00 plus US$10.00 shipping to any country in the world outside of UK.


Carlos Daniel Fidel dropped me a note that says he has been looking at some other circuits with the CA3035 and says it is a simple microphone amplifier with three amplified "etapas". Carl please figure out what and "etapa" is for me. Not in best Eng/Span dictionary that I have.


Claus-Peter wants to build the two-box on Carl's page but he says that the parts list for the receiver is missing. Looks like he is right to me. Help - Carl.


Best to all.


Dale

Carl
04-02-2000, 12:27 PM
http://www.thunting.com/geotech/forum/tech/images/tab2a.jpg


Can't believe I missed this! Also, I've dissected the 3035 and believe I can replace it with a dual op-amp. The 3035 has 3 separate gain amps (not op-amps) and the hardest thing is to make sure the RX coil gets loaded correctly. I'll probably have to build it up to make sure it's right.