[Amps] 4CX3000A vs 5000A

[John Lyles]

They have completely different sockets, better price that to see if you can afford it. The 5000 will play at 100 MHz, in the proper version of the socket. For what that's worth to you....
also, depending on your loadline, if you need higher cathode current on the RF cycle peaks, then you have to select the right tube, or suffer shorter life, and having to crank up the filament too high. Thats covered in Care and Feeding I believe. 
73
John 
K5PRO

> 
> Message: 6
> Date: Tue, 16 Feb 2010 18:54:21 -0600
> From: donroden at hiwaay.net
> Subject: [Amps] 3000/5000
> Cc: amps at contesting.com
> Message-ID: <20100216185421.53866q6d7yxs3ewt at webmail.hiwaay.net>
> Content-Type: text/plain;	charset=ISO-8859-1;	DelSp="Yes";
> 	format="flowed"
> 
> Quoting "Cecil Acuff" <chacuff at cableone.net>:
> 
> >
> > ----- Original Message ----- From: "Roger" <sub1 at rogerhalstead.com>
> >
> >>      4CX3000A filament 9.0VAC @ 41.5A  = 373.5 Watts
> >>      4CX5000A filament 7.5VAC @ 75A     = 562.5 Watts
> >>
> >>
> >> Tubes with handles.
> 
> 
> 4CX3000s vs 4CX5000s   at 4KW TPO ........... advantages either way  
> other than 200 watts of additional filament heat ?
> 
> 
> Don R