[Elecraft] new subscriber and first question

2013-09-03 Thread Doug Basberg
Hello; I just put together my K3/100 with ATU. What a great transceiver! Now I need to hook it to my vintage Collins 30L-1 linear amp. The manual says the K3 can handle up to 200 volts on 'key out'. That might mean I can hook up directly to the linear. One question is whether that

Re: [Elecraft] new subscriber and first question

2013-09-03 Thread Lyle Johnson
Hello DOug! I just put together my K3/100 with ATU. What a great transceiver! Now I need to hook it to my vintage Collins 30L-1 linear amp. The manual says the K3 can handle up to 200 volts on 'key out'. Positive only, not negative. ... I was thinking the K3 uses relay contacts for the

Re: [Elecraft] new subscriber and first question

2013-09-03 Thread Vic K2VCO
No, the K3 CANNOT switch a negative voltage for keyout! It is a solid-state circuit which is quite robust (+200v at 5A), but only for positive DC voltages. K3 schematics are here: http://www.elecraft.com/manual/K3_Schematics_Jun_2010.pdf On 8/31/2013 3:52 AM, Doug Basberg wrote: Hello; I

Re: [Elecraft] new subscriber and first question

2013-09-03 Thread Greg
Suggest you use one of those amp keyer interfaces for this amp. As an option, also look at the universal keying adapter from HamGadgets.com. http://www.hamgadgets.com/index.php?main_page=product_infocPath=21products_id=128zenid=r3o0i7qb2ikjcqj299lq3pudb2 73 Greg AB7R On 9/3/13, Vic K2VCO

Re: [Elecraft] new subscriber and first question

2013-09-03 Thread mikefurrey
, September 03, 2013 12:14 PM To: elecraft@mailman.qth.net; dbasb...@comcast.net Subject: Re: [Elecraft] new subscriber and first question No, the K3 CANNOT switch a negative voltage for keyout! It is a solid-state circuit which is quite robust (+200v at 5A), but only for positive DC voltages. K3