[50mhz] FS: Johnson Viking 6n2 ThunderboltAmplifier

[Joe - WDØM]

Gentlemen - hasn't this been "discussed" to everyone's satisfaction?

73,
Joe
WDØM

Carl wrote:
> http://www.rigpix.com/linears/6n2thunderbolt.htm
>
> http://www.ham.dmz.ro/power_amplifiers/efjohnson/6n2-thunderbolt.php
>
> http://frank.yueksel.org/sheets/049/7/7203.pdf
>
> You DO understand the difference between input and output power dont you? You DO understand the efficiency ratings of a Class AB1 amp DONT YOU? 
>
> The amp specs above are from the Johnson catalog.
>
> Some hams will always try to squeeze another 100W or so out of 4CX250's without regard to the resultant very poor SSB IMD and others on the band.
>
> In stock form the T-Bolt is not very good on IMD anyway. Ive rebuilt several for customers with the G3SEK tetrode boards which is a big help.
>
> Carl
> KM1H
>
>
>   ----- Original Message ----- 
>   From: J. Gordon Beattie, Jr., W2TTT 
>   To: 6meter at yahoogroups.com ; 'Carl' ; 50mhz at mailman.qth.net ; sidewindersontwo at yahoogroups.com ; ham4sale at yahoogroups.com 
>   Sent: Sunday, May 24, 2009 11:56 AM
>   Subject: RE: [50mhz] [6 Meter Sked] FS: Johnson Viking 6n2 ThunderboltAmplifier
>
>
>   One follow up point from page 2 of the manual files...
>
>    
>
>   ftp://bama.sbc.edu/downloads/johnson/6n2amp/01.gif
>
>    
>
>    
>
>   This, and my testing are what I used as the basis for my views.
>
>    
>
>   Thanks & 73,
>
>   Gordon Beattie, W2TTT
>
>   201.314.6964
>
>    
>
>
> ------------------------------------------------------------------------------
>
>   From: 6meter at yahoogroups.com [mailto:6meter at yahoogroups.com] On Behalf Of J. Gordon Beattie, Jr., W2TTT
>   Sent: Sunday, May 24, 2009 2:58 AM
>   To: 'Carl'; 6meter at yahoogroups.com; 50mhz at mailman.qth.net; sidewindersontwo at yahoogroups.com; ham4sale at yahoogroups.com
>   Subject: RE: [50mhz] [6 Meter Sked] FS: Johnson Viking 6n2 ThunderboltAmplifier
>
>    
>
>
>
>
>
>
>   Carl,
>   I only have run it to 800W, but it clearly could do more and there are
>   several who have noted the higher power level for theirs. 
>   In any case, I'm flexible on the price, as I don't want to just sit another
>   five years until I can get a new QTH and ham shack. 
>
>   Thanks & 73,
>   Gordon Beattie, W2TTT
>   201.314.6964
>
>
>   -----Original Message-----
>   From: Carl [mailto:km1h at jeremy.mv.com] 
>   Sent: Sunday, May 24, 2009 12:54 AM
>   To: J. Gordon Beattie, Jr., W2TTT; 6meter at yahoogroups.com;
>   50mhz at mailman.qth.net; sidewindersontwo at yahoogroups.com;
>   ham4sale at yahoogroups.com
>   Subject: Re: [50mhz] [6 Meter Sked] FS: Johnson Viking 6n2
>   ThunderboltAmplifier
>
>   If that puts out 1200W in stock form I'll eat it. More like 600-700W 
>   with 4CX250B's, less with the original 4X150A's.
>
>   Its not that rare an amp and they show up regularly in various 
>   conditions.
>
>   Carl
>   KM1H
>
>   Carl
>   KM1H
>
>   ----- Original Message ----- 
>   From: "J. Gordon Beattie, Jr., W2TTT" <w2ttt at att.net>
>   To: <6meter at yahoogroups.com>; <50mhz at mailman.qth.net>; 
>   <sidewindersontwo at yahoogroups.com>; <ham4sale at yahoogroups.com>
>   Sent: Saturday, May 23, 2009 5:36 PM
>   Subject: Re: [50mhz] [6 Meter Sked] FS: Johnson Viking 6n2 
>   ThunderboltAmplifier
>
>   > Hi Folks!
>   >
>   >
>   >
>   > Just an update on the amplifier based on suggestions made by several 
>   > owners
>   > and admirers of this amplifier:
>   >
>   >
>   >
>   > It only takes a few watts (5-7W) of drive to get the full 1200W output 
>   > on
>   > either Six Meters or Two Meters.
>   >
>   >
>   >
>   > If drive it with less, it will put out less, but for a longer, more 
>   > reliable
>   > time.
>   >
>   >
>   >
>   > There were only about 250 units produced by the factory, so it is a 
>   > bit of a
>   > collector's item for those who cherish tube amplifiers.
>   >
>   >
>   >
>   > Finally, while this is a dual band amplifier for 50 & 144 MHz that 
>   > puts out
>   > about 1200W,
>   >
>   > I am not greedy and the "buck a watt" rule of thumb will not be in 
>   > effect
>   > here but a respectable offer will be accepted, if offered.
>   >
>   >
>   >
>   > Thanks & 73,
>   >
>   > Gordon Beattie, W2TTT
>   >
>   > 201.314.6964
>   >
>   >
>   >
>   > _____
>   >
>   > From: 6meter at yahoogroups.com [mailto:6meter at yahoogroups.com] On Behalf 
>   > Of J.
>   > Gordon Beattie, Jr., W2TTT
>   > Sent: Friday, May 22, 2009 8:11 PM
>   > To: 6meter at yahoogroups.com; 50mhz at mailman.qth.net;
>   > sidewindersontwo at yahoogroups.com; ham4sale at yahoogroups.com;
>   > microwave at echo.valinet.com
>   > Subject: [6 Meter Sked] FS: Johnson Viking 6n2 Thunderbolt Amplifier
>   >
>   >
>   >
>   >
>   >
>   >
>   >
>   >
>   > Hi Folks!
>   >
>   > Johnson Viking 6n2 Thunderbolt Amplifier
>   >
>   > This is a desktop amp that will work great on the 50 and 144 MHz 
>   > bands!
>   >
>   > You high power on two bands with this amp!
>   >
>   > Dual 4CX250B Amplifier with spare tubes.
>   >
>   > I will ship it, but would prefer to drive up to 225 miles from 
>   > northern New
>   > Jersey to meet someone or to deliver it.
>   >
>   > Payment can be via PMO or PayPal. If you want to send a personal 
>   > check,
>   > then it will need to clear before delivery.
>   >
>   > Make me a respectable offer before I put this on EBay and the amp is 
>   > yours
>   > in time for the DX and contest season!
>   >
>   > Thanks & 73,
>   >
>   > Gordon Beattie, W2TTT
>   >