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1. [Amps] Controlling blower fan speed... (score: 1): Author: thaxton@ptgroup.com (thaxton@ptgroup.com); Date: Fri, 15 Nov 2002 23:24:20 -0700; I'd like to hear from anyone who has constructed/ designed/juryrigged, a fan speed controler for the tubes in their amp. I found a couple of squirell cage blowers that I'd like to adapt and control t; /archives//html/Amps/2002-11/msg00266.html (7,366 bytes)
2. [Amps] Controlling blower fan speed... (score: 1): Author: 2@vc.net (Rich); Date: Sat, 16 Nov 2002 05:33:32 -0800; Tektronix was doing this over a decade ago. A thermistor controlled the base current flow through a pass transistor whose emitter drove a DC brushless fan. The hotter the thermistor got, the faster; /archives//html/Amps/2002-11/msg00271.html (8,128 bytes)
3. [Amps] Controlling blower fan speed... (score: 1): Author: garyschafer@attbi.com (Gary Schafer); Date: Sat, 16 Nov 2002 15:51:16 -0500; I have used a series capacitor to slow the blower speed down. Then place a temperature switch above the tube in the air path that will short out the capacitor when things heat up. 73 Gary K4FMX; /archives//html/Amps/2002-11/msg00278.html (7,775 bytes)
4. [Amps] Controlling blower fan speed... (score: 1): Author: w8ron@stratos.net (Ron); Date: 18 Nov 2002 09:04:33 -0500; On the FT-101 there was a mod to drop the fan speed on receive. It was a simple resistor to drop the AC voltage to the fan causing more slip and slowing the fan speed. It worked fine. -- Ron; /archives//html/Amps/2002-11/msg00307.html (8,008 bytes)

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