[Amps] 3-500z - intermittent filament

[David G4FTC]

>From: "Robert B. Bonner" wrote
>
>
>Well the amplifiers where where air blew sideways across the tubes and pins
>instead of through the sockets or didn’t have enough airflow due to NOISE
>CONCERNS developed a syndrome.
>


That reminds me of a conversation I had with someone on the Alpha stand at 
Dayton a few years ago.

I commented upon what I thought was a rather hot exhaust temperature on one 
of their amps and asked whether it would have been better to increase the 
airflow.

The answer was quite simple - blower/fan noise is the biggest turn-off to 
potential buyers. More air flow means more noise, and in order to sell an 
amplifier in an amateur market, blower/fan noise must be kept to the 
absolute minimum.

However, the use of the ceramic bases and the fan as opposed to a proper 
blower and Eimac air system sockets for the SB-220 and the L4B is more 
likely to be for commercial reasons - i.e. getting a product to market for 
no more than a certain price.

David G4FTC

_________________________________________________________________
Have you tried Windows Live Spaces? Tell us what you think! 
https://www.msnfeedback.com/perseus/surveys/961278308/6653c632.htm