Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Not really. However, the "banging" doesn't hurt them, it is just very annoying! Glen, K9STH Website: http://k9sth.net From: Gary Franklin To: Boatanchors Sent: Friday, October 14, 2016 9:55 AM Subject: [Boatanchors] Navigator and Heathkit A-1 Meters Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Gary - Replace the meter.. The AT-1 has a three position meter switch, Grid-Off-Plate to eliminate the noise once tuned up, I don't know about the Navigator. -- 73, Garey - K4OAH Rome, GA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs Gary Franklin wrote: Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? Gary K8BKB ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Well, shazaam -- There's an article by WB4OGM in the latest (Oct. 16) ER that describes the AT-1 meter in detail, but (I haven't read it in detail) doesn'tseem to fix the old gripe other than to say that in the AT-1, at least, there is one switch posn that disconnects the meter. He say that it's not really a "moving vane" meter as is usually claim, but is a "moving magnet" movement, but they both have about the same characteristic overshoot. IIRC several of the early Heath xmtrs had the same type meter, I built one of the first DX-35's and griped abt it then. 73, Al, W8UT www.boatanchors.org www.hammarlund.info "There is nothing -- absolutely nothing -- half so much worth doing as simply messing about in boats" Ratty, to Mole On 10/14/2016 11:16 AM, Wilson Lamb wrote: Capacitor? WL -Original Message- From: Gary Franklin Sent: Friday, October 14, 2016 10:55 AM To: Boatanchors Subject: [Boatanchors] Navigator and Heathkit A-1 Meters Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? Gary K8BKB ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Probably not (well, other than putting a better meter in!!). I also find the meter banging around to be a real PITA but, in my mental musings, I haven't thought of any way to tame the beast. You could use an RC network (sort of a slow attack quick discharge) but that would take some fiddling around with. Basically you have, in the meter, a mechanical system with a 'huge' amount of overshoot. You hit the meter with a quick shot of current and it goes way over and then settles back to the right reading. The ONLY way to cure that is to slow down the current rise. Then, of course, you have to worry about the what happens when the drive current goes down - you don't want to have too much 'hang'. Plus the next part of the problem is that meter resistance is fairly low - so you are limited in how much R (as part of your RC network) you can put in series with meter. So the R needs to be a low value. Which means the C needs to be big'ish. I thought about playing around with this on the bench but ... well, just one more thing I won't get to. 73Bob Groh, WA2CKY On Friday, October 14, 2016 9:55 AM, Gary Franklin wrote: Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? Gary K8BKB ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Switch a resistor = to meter resistance in series so meter moves 50%. Could be done with mini relay activated when transmitting . 73, John -- Sent from my Tablet ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Navigator and Heathkit A-1 Meters
Capacitor? WL -Original Message- From: Gary Franklin Sent: Friday, October 14, 2016 10:55 AM To: Boatanchors Subject: [Boatanchors] Navigator and Heathkit A-1 Meters Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? Gary K8BKB ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
[Boatanchors] Navigator and Heathkit A-1 Meters
Is there a solution for snubbing/taming the meter action on the Johnson Navigator and Heathkit AT-1 meters? Gary K8BKB ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors