[Top] [All Lists]

[AMPS] YC156 ratings

To: <>
Subject: [AMPS] YC156 ratings
From: (Rich Measures)
Date: Fri, 26 Feb 1999 07:20:46 -0800

>> What is the maximum ratings that you can drive the YC156 too. One 
>> presumes you have to stay in the 5000 watt plate dissipation rating. If 
>> so one would be better just to use the ordinary 3cx5000, which is 
>> cheaper and more available.
>The 3CX15000B7 data sheet gives typical operating conditions of 10.2 KW 
>upsful power with 6 KV at 2.6 Amps, 300 watts drive.  By my calculations 
>that results in slightly more than 5 KW anode dissipation.  

?  sounds reasonable. 

> I would not 
>want to run a YC-156 that way in CW or RTTY service 

?  As I understand the ratings, 10 out on RTTY should be doable.   

>but given the duty 
>cycle for SSB, I suspect 10 KW peak would be safe there.  If you intend 
>to drive a YC-156 that hard, be prepared to provide a lot of air (> 250 
>CFM at > 2.5 inches of back pressure). 
?  2.5 inches of cooling-air back pressure means a 3400-rpm blower And 
that means lots of noise.  However, with an 8171, a mere 0.5 inches of 
back pressure is needed, which means a 1700-rpm blower will do the job, 
and that means a lot less noise.  Other niceties are greatly reduced 
tuned-input complexity, and the 8171 drives direct with a 150w radio, so 
no buffer-amplifier is needed. .  The trade-off is building the LM723 
ic/6N60 fet  regulated screen supply.

-  later, Joe


R. L. Measures, 805-386-3734, AG6K,  

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>