TenTec
[Top] [All Lists]

Re: [TenTec] Corsair II Question

To: Shawn Upton <kb1ckt@yahoo.com>, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Corsair II Question
From: Bob DeVarney W1ICW <w1icw@myfairpoint.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 24 Mar 2022 11:42:28 -0400
List-post: <mailto:tentec@contesting.com>
If I recall correctly I was only getting 30 watts on 10 Meters. Might be interesting to snap an ammeter on the DC input to the final and see if it's a lack of drive or output mismatch. That's how I found my issue. I can provide my measurements if you like for comparison.

On 3/24/2022 10:51 AM, Shawn Upton via TenTec wrote:
Looks like 70-80W on 10m.  The radio thinks it's a full 100W.
If I go down from 10m power goes up slightly, never quite 100W but close enough 
for me.
Shawn kb1ckt

     On Thursday, March 24, 2022, 10:18:17 AM EDT, Bob DeVarney W1ICW 
<w1icw@myfairpoint.net> wrote:
Hi Shawn,

what's the output like on the bands 20 and above? I recently restored
one and spent quite a bit of time chasing  my tail. I had full output on
160-40 but it dropped off rapidly above that.

I eventually discovered one of the final transistors was open. The
little "3D structure" of resistors/caps they used to bias the
transistors had a bad solder joint that had opened up and this killed
the transistor.

Take the final section off and give it a good visual inspection, and
maybe even wiggle things a bit in that area and you may find the same thing.


On 3/24/2022 9:04 AM, Shawn Upton via TenTec wrote:

So I picked one up last weekend, supposedly gone through and all that.  Seems to be true, as it's seemingly 
working--except for the drive?  If I set ALC full clockwise, in order to get 80-90W out on 40m I have drive 
set to 7.5.  Seems high?  I have an Omni C that is on the desk I'm comparing to.  I'm not concerned 
a bit about "only" getting 80W, I just want to make sure that drive needs to be this high.
Quick check shows 90W on 160m with drive at 7.75, while on 10m I get like 70W at 8.1 on the 
knob.  So it's actually really flat response on the drive--maybe I'm just too used to my Omni 
where drive changes "a lot" from band to band.  :)
Shawn kb1ckt
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
<Prev in Thread] Current Thread [Next in Thread>