Re: [AMRadio] Current on 6146s

2007-02-12 Thread Geoff/W5OMR
Mark W1EOF wrote: Isn't 15ma *WAY* too much grid current for a pair of 6146s? In my Viking II I used to run about 6-8 if I recall correctly. They can be easily destroyed pretty quickly by too much grid current. Sure it is. 7.5mA is what's required on a pair, according to Johnson, and the

RE: [AMRadio] Current on 6146s

2007-02-11 Thread Jim candela
From John E. Coleman (ARS WA5BXO): I have found it to be very important to make measurements while in operation. Except that RF will mess up the meter readings. This is why I said to ground the grid directly and then kick the rig to XMIT and make the measurements then. Checking the plate

Re: [AMRadio] Current on 6146s

2007-02-11 Thread Mark W1EOF
Isn't 15ma *WAY* too much grid current for a pair of 6146s? In my Viking II I used to run about 6-8 if I recall correctly. They can be easily destroyed pretty quickly by too much grid current. 73, Mark W1EOF Jim candela wrote: From John E. Coleman (ARS WA5BXO): I have found it to be

Re: [AMRadio] Current on 6146s

2007-02-11 Thread W4AWM
Hi Mike, You are correct. The max grid current for the Viking II pair of 6146s is 8MA. 73, John, W4AWM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help:

Re: [AMRadio] Current on 6146s

2007-02-11 Thread John Lawson
On Sun, 11 Feb 2007, [EMAIL PROTECTED] wrote: Hi Mike, You are correct. The max grid current for the Viking II pair of 6146s is 8MA. Additionaly, the Valiant (3 6146s) calls for 10 mA of grid current. Cheers John KB6SCO DM09fg

Re: [AMRadio] Current on 6146s

2007-02-11 Thread Peter Markavage
CCS rating is 3.5 ma max. per tube ICAS rating is 4.0 ma max. per tube. Pete, wa2cwa On Sun, 11 Feb 2007 22:48:32 -0500 Mark W1EOF [EMAIL PROTECTED] writes: Isn't 15ma *WAY* too much grid current for a pair of 6146s? In my Viking II I used to run about 6-8 if I recall correctly. They can

[AMRadio] Current on 6146s

2007-02-10 Thread John E. Coleman (ARS WA5BXO)
I have found it to be very important to make measurements while in operation. Except that RF will mess up the meter readings. This is why I said to ground the grid directly and then kick the rig to XMIT and make the measurements then. Checking the plate voltage on the plate while the tube is