----- Original Message ----- Subject: Re: [AMRadio] HRO-50 Date: Mon, November 26, 2007 16:03 From: "Mike Sawyer" <[EMAIL PROTECTED]>
> What a pain in the scrote. I agree. Still, when the 1st HRO came out, nothing else on the market could touch it. >The manual says to adjust the coils for the low > end of the band, (in this case, I'm using coil set D 1.8-4.0M GC 3,5-4.0 BS) > and there aren't any adj. available. I looked in the in each coil set and I > can see the coil but it looks as though it was designed not to be adj. and > I'm hesitant about attempting to adj. them. For the low end of the bands there is a 1/2 turn on the INTERIOR of the coil form that is to be moved either to buck or boost the main winding, or anything in between. "Pain in the Scrote" sums it up pretty well ;>) How you are supposed to make slight adjustments, noting the output level, pull the coil, poke that 1/2 turn a bit, again note the output level, and ultimately find the peak is beyond me. I usually optimize at the top of the band (where trimmer caps are accessible with the coil installed at the top, and watch the output level as I adjust) and take what I get at the bottom of the frequency range - life is too short! Maybe when I retire I'll do the PROPER alignment on my 2 HROs, if I run out of stuff to do... 73/GL, -Larry/NE1S ______________________________________________________________ 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.
