[Amps] Multi-tube vs Single or Dual-tube amps?

[Roger (K8RI)]

But in "those days" they didn't worry about matching tube in a lot of 
amp, or IM for that matter.  On one hand we had the 32S* series and 
KWM-2 at 50 db IM or less, while on the other we had 19 sweep tube amps 
at who knows what for IM, but -30 db (if that much) was doing really 
good.  The sad part is that only recently have top end SS rigs gotten 
much better than - 30 db and that's usually class A..

Then new (and some old who should know better) complain that their new 
Cadillac rig claiming 100 db plus of dynamic range and with super 
narrow, steep sided filters claiming stupendous figures able to operate 
within a few KHz of a 20 over 9 signal, complain their rig won't do what 
they advertized, never mind, that station 3 KHz up has -30 db IM and is 
20 KHz wide at S8.

Try to convince one of them that it's the other guy's transmitter and 
not their receiver<LOL>

Fortunately those Multi(many tube)sweep tube amps are finding sweep 
tubes difficult to find and getting expensive.

We're working on the wrong things!

73

Roger (K8RI)

On 1/20/2015 1:22 AM, Fuqua, Bill L wrote:
>    I bet you have a much better chance of getting two matching 4-125A tubes than 10 sweep tubes.
> Hi Hi Hi
> ________________________________________
> From: Amps [amps-bounces at contesting.com] on behalf of Tom Osborne [w7why at frontier.com]
> Sent: Tuesday, January 20, 2015 12:13 AM
> To: amps at contesting.com
> Subject: Re: [Amps] Multi-tube vs Single or Dual-tube amps?
>
> I remember the WRL Galaxy 2000 had 10 sweep tubes in it.  That was quite
> a beast :-)  73
> Tom W7WHY
>
>
>
> On 1/19/2015 7:27 PM, Bill Turner wrote:
>> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>>
>> On Mon, 19 Jan 2015 20:48:26 -0600, you wrote:
>>
>>> ( and eight 1646s might not hit 15 meters )
>>>
>>> Don W4DNR
>> REPLY:
>>
>> That problem of excessive output capacitance was solved long ago.
>> Consult any recent ARRL Handbook in the amplifiers section. Look for
>> info about an L-network in the plate circuit.
>>
>> Bill W6WRT


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