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[TenTec] Ten Tec 2m transceiver, comments and impressions

To: <tentec@contesting.com>
Subject: [TenTec] Ten Tec 2m transceiver, comments and impressions
From: kovar@ia.net (K0VAR Jack Kovar)
Date: Thu, 26 Jun 1997 03:17:07 -0500 (CDT)

On Thu, 26 Jun 1997, K0VAR Jack Kovar wrote:

> 
>       Chuck,
> 
>       Great to hear of your luck with 1220.
> 
>       The baby powder on slug and coil would have helped.
> 
>       I found transmitt audio to have a low level crackle.
> 
>       Fix was to reroute b+ power a few cm away.
> 
>       Transmitt audio, with adjustment at max is still weak.
> 
>       Never did fix that.
> 
>       My 5 watt version produced a maximum of 3 watts even after bending
> 
>       and remaking output coils.
> 
>       The worst problem is rf immunity.
> 
>       When I fire up the Titan I reset all the memories back
> 
>       to 146.52 mhz. I installed it into the car and lost memories in
> 
>       less than a week.
> 
>       I live about 10 miles from a populated broadcast transmitter site.
> 
>       I have noticed signal mixing in the 1220 that interferes or
> 
>       causes high squelch setting to bypass noise.
>               
>       I dislike the waist of memories allocated to split operation.
> 
>       It is a great packet radio.
> 
>       Receive audio is very full and plesant, Just bit of extra ringing.
> 
>       Seems audio stage is at upper gain end of design.       
> 
>       I is plesant to program in it's simple way.
> 
>       and it's default to 146.52 was a wonderfull idea.
> 
>       A bit too wonderfull as time goes on loosing memories.
> 
>       My wife build this 1220 with my over looking.
> 
>       It was a great experience for both of us.
> 
>       I was planing on putting it in her car.
> 
>       I simply do not trust memories and dislike low transmit audio.
> 
>       We will never part with her 1220 rig.
> 
>       We keep it with are Ten Tec colection ** 
        
        Overseas radio still rules the roost in our car for now.

                        Jack and Jana Kovar

                        K0VAR & KB0VEA

> 
>       
Sorry about last post as I could use a bit of sleep.

        
> 
>       
> 
> On Wed, 25 Jun 1997, Chuck Murcko wrote:
> 
> > Hi all. I just finished putting a 1220/1222 combination on the air. This has
> > turned out to be a very nice rig, and has one of the best 2m receiver 
> > sections
> > I've ever used. The exception was an old Icom with helical resonators, but
> > that's another story.
> > 
> > Construction was quite straightforward, save for a number of small hitches.
> > 
> > 1) Things get tight at the end of assembly, when mounting the power
> >    transistors to the back subpanel/RF shield. Go slowly here. Same goes
> >    for the T-R board assembly.
> > 
> > 2) One PEM nut was missing from a side subpanel. No big deal; the rig is
> >    exceptionally well engineered and solid, especially if the instructions
> >    to hot glue the VCO coil are followed. Case rigidity seems unimpaired by
> >    missing fastener.
> > 
> > 3) Go easy on the slug in the VCO coil; mine cracked, and I had to clean it
> >    out and replace it with one of similar ferrite mix from the junkbox. My
> >    fault.
> > 
> > 4) You really have to clip lead power to the 1222 amplifier to align it. The
> >    input tuning capacitor is impossible to get at when mounted for testing
> >    as suggested in the manual.
> > 
> > With the amplifier, I measure 40w out at 146.000 MHz and 37w at either band
> > edge. With a small dual band antenna (Cushcraft AR-270, about 4' tall)
> > mounted at 18' above ground, I can reliably use repeaters up to 35-40 mi
> > away, and get about 10 mi further when the band opens a bit on these summer
> > evenings. Haven't experienced any tunnels or skip yet. 8^)
> > 
> > All reports so far have remarked on the excellent transmit audio and lack of
> > synthesizer noise (a *big* problem with the old Ramsey kit transceivers).
> > 
> > The receiver is *very* good. No birdies or synthesizer artifacts are 
> > audible.
> > The one thing I thought was one turned out to be a bad power line insulator
> > outside. Excellent intermod performance and image rejection, too.
> > 
> > Packet and PL work fine. It was a bit odd getting used to having simplex
> > frequencies in the lower memories (The upper memories are used to store
> > frequency pairs for nonstandard offsets, so any simplex frequency stored
> > there is considered as one of the pairs).
> > 
> > Is there a 440 Mhz kit in the future? This would be very nice, though harder
> > to package for a kit than a 144 or 220 MHz unit.
> > 
> > What I miss on this rig is general purpose scanning capability. Perhaps
> > something like scanning between any two (or the first two) memory 
> > frequencies
> > could be done in future. I can also see myself running out of memories
> > eventually, though I've never used more than 30 on any ham rig I've had.
> > Somehow I can't see the need for hundreds or thousands, myself. It'd be
> > difficult to add too many more functions with only four pushbuttons on the
> > front panel.
> > 
> > All in all, the rig took about 25 hours to build and align, working slowly
> > and carefully, though persistently. No doubt the second or third would go
> > much faster. 8^)
> > 
> > I haven't used this transceiver in the car yet, so I can't report on that
> > aspect of use.
> > 
> > All in all, a very nice rig for T-T and anyone with the time and expertise
> > (you should probably have one other simple kit that uses small parts under
> > your belt before starting one of this complexity). The stage by stage, build
> > and troubleshoot as-you-go approach makes the job very straightforward.
> > --
> > chuck
> > Chuck Murcko            The Topsail Group             West Chester PA USA
> > chuck@topsail.org
> > 
> > --
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> > Submissions:              tentec@contesting.com
> > Administrative requests:  tentec-REQUEST@contesting.com
> > Problems:                 owner-tentec@contesting.com
> > Search:                   http://www.contesting.com/km9p/search.htm
> > 
> 
> --
> FAQ on WWW:               http://www.contesting.com/tentecfaq.htm
> Submissions:              tentec@contesting.com
> Administrative requests:  tentec-REQUEST@contesting.com
> Problems:                 owner-tentec@contesting.com
> Search:                   http://www.contesting.com/km9p/search.htm
> 

--
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