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[Amps] Fw: 3cx3000A7 driver

To: <amps@contesting.com>
Subject: [Amps] Fw: 3cx3000A7 driver
From: "m.ford" <k1ern@pioneerwireless.net>
Date: Sun, 23 Jul 2006 18:27:19 -0400
List-post: <mailto:amps@contesting.com>
----- Original Message ----- 
From: "m.ford" <k1ern@pioneerwireless.net>
To: "crawfish" <crawfish@surfmore.net>
Cc: <amps@contetsting.com>
Sent: Sunday, July 23, 2006 6:21 PM
Subject: Re: [Amps] 3cx3000A7 driver


>
> ----- Original Message ----- 
> From: "crawfish" <crawfish@surfmore.net>
> To: "Karl-Arne Markström" <sm0aom@telia.com>; <g3rzp@g3rzp.wanadoo.co.uk>; 
> <amps@contesting.com>
> Sent: Sunday, July 23, 2006 2:33 PM
> Subject: Re: [Amps] 3cx3000A7 driver
>
>
> I remember that Natioanl had a transceiver called the NCX-1000, which
> supposed ran a kW input on SSB. This was  before I got into ham radio. Did
> it really deliver 600 watts output as it should have, and was wondering why
> it was never duplicated by anyone else?
>                                  Joe W4AAB
> snip
>
> I sold my NCX-1000 a few years ago to K1GUP for his extensive boatanchor 
> museum.
> Also included were many spares including another half assembled chassis and 
> enough
> parts to finish it. I obtained the units from the last owner of National in 
> 1986 at about
> the same time I removed the Rohn 25 foldover from the factory roof.
>
> Behind the factory, across from the loading dock there stood a small storage 
> shed
> packed with NCL-1000 tranceivers in various stages of completion. Most had the
> driver tubes installed but no final 8122. There were boxes full of completed  
> boards
> and spare parts but no cabinets. The owner said "take your pick Mike they 
> will never
> get finished anyway". So I did.
>
> I finished assembly of a complete unit and had the thing working albeit not 
> up to the output
> one should see. As years went by I swapped out boards and parts and just 
> about did
> everything I could think of to get it to bark. In each case all the 
> individual statges would
> meet their output level but just barely. The sum of all the low end specs 
> resulted in an
> output of no more than 300 Watts in the tune position.
>
> Years later the rest of the stufff got auctioned off and someone was selling 
> completed
> units for a while. The real deal has an analog tuning dial. The reworked and 
> not assembled
> by National have a digital readout in place. Probably because the dials were 
> not found.
>
> From my experience building one I can say that there was a major problem with 
> thru eyelets
> on the front end boards and the final needed more drive. I did install an 
> Anzac AM-109 as a
> predriver and it woke up the final but I removed it when it went to the new 
> owner who actually
> uses it on a local AM net. It sounds good.
>
> If you need specs or other info contact K1GUP. I gave him all the manuals and 
> my notes.
>
> Mike  k1ern
>
> 

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