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
> >
> > --
> > 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
> >
>
> --
> 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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