[Amps] Alpha chimneys

[Carl]

It also makes an excellent place to insert a thermostat switch to change 
blower speeds.

Carl
KM1H


----- Original Message ----- 
From: "Jim Barber" <audioguy at q.com>
To: "Vic K2VCO" <k2vco.vic at gmail.com>; "Amps reflector" 
<amps at contesting.com>
Sent: Friday, November 08, 2013 6:15 PM
Subject: Re: [Amps] Alpha chimneys


> It varies.
>
> With the Alpha 76A and variants, the chimneys just butt up against the 
> perforated metal in the top of the case.
>
> With the 77* series, they're wrapped conically, (instead of a straight 
> tube) and the smaller end is clamped to an exhaust pipe.
>
> I like the system. It makes changing out tubes a little more interesting 
> if the chassis is tight, but keeps the exhaust air controlled.
>
> In my last 8877 I slit the rubber up the side, (for the anode connection 
> strip) then made a little larger drill hole at the end of the slit to 
> prevent it from tearing out. After some juggling and clamping the rubber 
> to the anode cooler with a stainless hose clamp, everyone was happy.
>
> My .02,
> Jim N7CXI
>
> On 11/8/2013 3:02 PM, Vic K2VCO wrote:
>>
>>     Can someone tell me how Alpha and others that use silicone rubber 
>> chimneys
>>     on  the tubes deal with the tops of the chimneys? Do they just butt 
>> up
>>     against a perforated section of the top cover, do they exhaust into 
>> the
>>     cabinet, or what?  I've looked at many amplifiers with the covers 
>> off, but
>>     I've never noticed!
>>
>
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