[NLRS] 222 ???

[Gerald]

On Wed, 2005-09-14 at 10:58 -0500, Clair J. Robinson wrote:
> 
> christenson at charter.net wrote:
> 
> > 
> > Looking to add 222 to the operation. I have 2 rigs that can operate on the typical 10 meter inputs. Issue is that both of them the can only transmit a minimum of 5 watts. Every transverter I have seen out there wants a maximum of 100 mW. What do a ham do? The preferred rig is a TS-2000, currently the 6 M rig, or my faithful IC-706m2g. Don't want to put too much into it but then again don't want crap. Any ideas out there? Any info greatly appreciated.
> > 
> > I may even drop the ic-910 and pick up a ft-736r with all the mods - 6 meters?
> > 
> > KC0REO
> > 
> > Kris
> > 
> 
> I have DEMI 2m, 432 and 1296 transverters with 10 watt (max) interfaces. 
> I tried playing around with the alc power reduction scheme, but I found 
> it to be much too fussy with my FT-990. The FT-990 can be turned down to 
> about 10 watts output, but I wanted something foolproof so that I 
> wouldn't burn something up if I forgot. I finally just used a dummy load 
> into which I transmit at about 50 watts and tap a little power off of it 
> to drive the 10m i.f. transverters. This works just fine and if I forget 
> to turn the i.f. power down and run at 100 watts, it only results in 3 
> db overdrive which doesn't seem to matter much.
> 
> On 1296, the i.f. rig is an FT-897 on 2 meters. It automatically sets 
> the power output on 2 meters to 2 watts when the transverter mode is 
> selected. Very handy. I don't think that Yaesu has documented this 
> feature anywhere, but I have compared notes with other users and they 
> all work this way.
> 
> 73, CJ KØCJ

On the FT-857 which I believe shares the boards of the 897, just is in a
different batteryless case, there is a 5th pin on the power connector
that drops power to 20 watts on HF through 2m and 10 watts on UHF when
grounded. Its labeled "battery sense".

In the alignment menu there are settings for minimum power for HF bands,
6m and VHF. These might be applied for transverter operation, but the
2003 vintage 857 manual I just checked barely mentions transverter
operation. I need to locate my newer 857 manual (that rig includes 60
meter operation).

-- 
73, Jerry, K0CQ
Dr. Gerald N. Johnson, electrical engineer
All content copyright, Dr. Gerald N. Johnson