I have recently bought a 2nd hand MAXON SM-4450 off eBay. The unit was listed without a PTT but the price was so ridicules that I couldn't resist buying it.
Looking for a PTT I realized there are limited places that sell the MA-4472 PTT - and in outragous prices (twice than what I paid for the radio )
I found a schematic of the PTT unit (http://www.testequip.com.au/downloads/m ... ervice.pdf) and I was thinking of taking a low cost ICOM/YEASU compatible PTT which are solder for $5 (example http://www.dealextreme.com/details.dx/sku.14769) - any ideas on how to wire it?
Thanks in advance!
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