[Johnson] Thunderbolt and Valiant

[Jack]

Hi Guys,

I think the TBolt Ranger combo would be nice. I have a barefoot Ranger 
in service and a TBolt in the line for service (pretty original caps 
etc. needs check out). I plan on using the attenuator as described in 
the TBolt manual.

Rodger you are right, I thought a Valiant was heavy till I mustled the 
TBolt into the basement.

73,
Jack
WA9NQW
On Feb 19, 2007, at 4:56 PM, Rodger wrote:

> Hi John,
>
> Actually the Pacemaker is probably as close as you will get to an 
> exciter
> that really matches the T-bolt.  I have the combo and they work well
> together.
>
> I agree that the Valiant is in a power range that will not match well 
> with
> any outboard amplifiers (at the amateur legal limit) and there would 
> be very
> little practical gain in attenuating it sufficiently to use with the 
> Tbolt.
>
> By the way, the Thunderbolt isn't the heaviest piece of equipment I own
> since I have a Desk KW but it is actually the most difficult to move 
> around.
> It is around 130 pounds and the power supply components are not easily
> removed.  The Desk KW, on the other hand, was easily moved from the 
> barn
> workshop to its home in the radio room and it only takes a few minutes 
> to
> bolt all of the heavy iron back in place.  Just something for you and 
> your
> back to consider!
>
> 73, Rodger WQ9E
>
>> -----Original Message-----
>> From: johnson-bounces at mailman.qth.net [mailto:johnson-
>> bounces at mailman.qth.net] On Behalf Of John Lawson
>> Sent: Monday, February 19, 2007 4:25 PM
>> To: johnson at mailman.qth.net
>> Subject: Re: [Johnson] Thunderbolt and Valiant
>>
>>
>>
>>    I, too wanted this configuration.  Looked at, drooled over - nearly
>> bought - various T-Bolts to match my Valiant.
>>
>>
>>    However - there is some Prevailing Wisdom around such a plan - and 
>> that
>> wisdom is: don't bother.
>>
>>    You can't 'turn down' the Valiant - it wants to make around  120 
>> watts
>> or so all the time.
>>
>>    The Thunderbolt, as you observe, only needs 10 watts or so of 
>> drive.
>>
>>    So - you're going to waste 90% of the Valiant's output as heat.
>>
>>    The AM, RMS continuous output of the average Thunderbolt is not, 
>> IMHO,
>> that great of an increment over the Valiant, as these things go.
>>
>>    Why Johnson never made just a dedicated 'exciter' type rig to 
>> match the
>> T-bolts is rather typical of thier amateur-line thought proceses.
>>
>>    Before acquiring my RCA Broadcast transmitter, I had planned to do 
>> the
>> 'low-power' mod to one of my Rangers, and use that to drive the
>> Thunderbolt - and, considering the relative values of the rigs - that
>> might be an alternative to think about.
>>
>>
>>    Just my 200 millidollar for a Monday afternoon...
>>
>>
>> Cheers
>>
>> John
>> KB6SCO
>> DM09fg
>>
>>
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