Ahhh, That's no big deal Geoff. I still get about 25-30W of carrier even with 2 ma of grid current.
73, Ellen - AF9J ----- Original Message ----- From: "Geoff/W5OMR" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <[email protected]> Sent: Wednesday, October 17, 2007 8:10 PM Subject: Re: [AMRadio] VFO vs XTAL > Rick Brashear wrote: > > It doesn't matter as far as the operation is concerned IF there is enough > > drive. I'm not getting sufficient drive from either. However, I am getting > > much more drive from the internal crystal oscillator than from the Viking > > VFO and I found that strange. I would have thought the VFO would put out > > more RF than the xtal oscillator. > > > > What rig is this in, Rick? MAn, the Viking 122 VFO, at least on the > Viking II, has -plenty- of drive! > > I keep my grid drive control down, on 80m, around 2.5 or 3 on the knob. > That gives me around 7.5mA of grid drive for the pair of 6146's (yeah, > Ellen - I've been meaning to send you that correction - Johnson says a > single 6146 needs no more than 2.5mA of grid drive, the pair in the > Viking II needs 7.5mA of grid drive, and I'm guessing (someone tell me > for sure) that the Valiant, with it's (3) 6146's needs around 10mA of > grid drive?) and if I crank the knob up to around 5 or 6, then I've in > excess of 10mA of grid drive on the pair of 6146's. > > -- > Driving your AM Rig without a scope, > is like driving your car at night, without headlights. (K4KYV) > > -- > 73 = Best Regards, > -Geoff/W5OMR > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.488 / Virus Database: 269.14.13/1074 - Release Date: 10/16/2007 2:14 PM > > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
