[AMPS] 3 x 3-500Z

[Rich Measures]

......
>I was wondering if anyone have some experience with three 3-500Z in
>parallel??
>
>Anything particular to be worried about?
>
wasting money.  

>Have built an amp with two such tubes -  grounded grid construction -
>previously, without any problems at all....easy and reliable, but what
>about adding one tube??..anyone?
>
Each 3-500z likes to have about 65w of drive. If you have a 200w driver, 
you should be able to drive 3 bottles.   If you can manage 4kV under 
load,  such an amplifier should be able to deliver about 3k pep.  At the 
receiving end, a 3-holer would beat a 2-holer by about 1/3 of 1 S-unit.  
With 150w drive, an 8171 would beat the 3-holer by over 1 S-unit. 
........... Above 1500w, S-units are not inexpensive.  
cheers,  Johnny
Rich---

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


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