The traditional monitor for a failed blower is a air pressure sensor. But this is harder to implement with a variable speed fan arrangement. I was working on a fail-safe for this case and thought a s
ORIGINAL MESSAGE: REPLY: Sounds good to me. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Hi Jeff, that sounds like a really nifty device. Personally, I like the idea of having an air flow switch and your heat sensor. Easy for me to say huh? It seems that the air flow sensor could be set
Ive had several 3CX800 amps come thru for service that have had blower failure and the tubes actually melted the Eimac chimneys.....and survived! Its a pretty rugged tube. Carl KM1H _________________
Hello Jeff: The Collins 30S-1 does exactly what you propose to do, which proves that your idea works. In fact, it is so good that Art Collins copied it over 50 years ago. Too bad you did not patent i
That's a concept I used back in the '70s to engage a boxer fan on the back of an HW-101. A precision cylinder thermal switch was used to measure temperature inside the 101's PA compartment. In that
Colin, Wish he had come about 20 years ago and whispered "buy Google at the IPO." 73, Jeff ACØC www.ac0c.com --Original Message-- From: k7fm Sent: Monday, November 08, 2010 7:21 AM To: Jeff Blaine ;
Pick a temp figure you like everything to come to a halt at. Then head for a appliance part store and ask for a dryer safety cutout sensor at that temp figure. They are available in either one then c
I am surprised that a laser thermometer sensor with a programmable safety output level has not been utilised in high end amps, with the laser set on the anode seal area to trigger a shutdown circuit
"I am surprised that a laser thermometer sensor with a programmable safety output level has not been utilised in high end amps." Remember, Adrian, that many of us are hobbyists who have long debates
Thanks Gary, I am familuar with those. The similar button-type is used on the HVAC stuff. They are easier to get than the TO220 sized which seems to be a single-supplier thing. The button type is lar
Amp Supply mounted a thermal switch thru the side of a red silicone chimney in their 3CX800 series of amps. For the LK-550 it was mounted next to one of the three 3-500's. Its purpose was to switch t
Paul, Oh, the sweet ACOM. What an amp! I saw the ACOM in action and marvelled at the silent and air-as-you-need-it-only variable speed arrangement. It was that amp that got me onto this love of varia
ORIGINAL MESSAGE: REPLY: Most of that semiconductor based stuff has a hard time in a kilowatt-plus RF field. Plain old iron is best. :-) 73, Bill W6WRT _______________________________________________