I have a 6-meter-converted SB-220 equipped with the upgraded Harbaugh cooling fan, which provides more air circulation volume than the original Heathkit fan. It does a great job, but sounds like a B-
New XYL would probably work. In lieu of that, maybe just slow down the fan that's there? Most blowers aren't that quiet unless they're really low-speed ones that cannot produce much air. Listen to th
Please, I've seen this too many times. It is Harbach Electronics (formerly Harbach Engineering). 73, ... Joe, W4TV _______________________________________________ Amps mailing list Amps@contesting.c
"My XYL can't stand being in the same room with it. What solutions have any of y'all come up with to quiet this or similar amps' cooling fans? Like for example, are blowers generally more quiet than
A 200-300 Ohm 10W resistor Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
It already has, apparently. However, it was a serious question, despite the obvious reality that some guys think wanting to reduce the level of ambient noise in the shack is stupid. I'm sure there mu
Mine never did that.... having so said, take the old fan, drill some grease holes, and put it back in. Just watch it, however, to be sure it doesn't die mid-use. Dave N3DB ___________________________
ORIGINAL MESSAGE: REPLY: Not having an SB-220 I can't say how well it would fit, but the EBM-Papst blowers are powerful and quiet, although expensive. In my 8877 amp I am using a G2E108-AA05-44 which
Build an enclosure that vents out the back... equipment built into the wall concept. That will drop the noise at least by half. Don WA4NPL _______________________________________________ Amps mailing
That wont work with the Harbach high speed fan, its an air noise issue. A 200-300 Ohm 10W resistor will slow it down a bit and a toggle switch or relay can turn it into a 2 speed unit as done on the
I bought for mine a good sized blower, installed it outside of the shack and routed the air through a clothes dryer hose to the amplifier. The hose comes in a kit, complete with a flange to be attach
Go back to the original fan which was nice and quiet . . . . but be warned, the xyl will sound a lot louder if the fan is quieter. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/v
Actually, I would suggest that Bill buy some diamond earrings for his XYL. They will reduce the perceived noise level by several dB. --JohnK 73 de W5NNH 10X 75371/M&M 117/SMIRK 6185/Six Club 285/TRA
I'll second that as a good idea. Also you may wish to mount the blower on rubber bushes to stop the vibrations from using the amp chassis as a soundbox and putting sound-deadening lagging in short pi
They may cool her down significantly, but still keep her warm enough. Sounds like things will be right in the "happy values". -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin ____________
Try to increase the db output of the blower then tell your wife you're buying a new amp because you love her sooo much and would do anything to please her !! _________________________________________
Add a spigot to the return line for morning coffee or afternoon tea. Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm
The 3-500 is an easy tube to cool as it only takes a breeze to do so. Adding chimneys and blowing the air up around them certainly makes the cooling more efficient. Also the remote blower with ductin