[NLRS] Re: [VHF] Fwd: FT-857D Transverter operation

[Clair J. Robinson]

Not quite. The 897 TX power adjustment seems to work the same when in 
transverter mode but in fact it doesn't work at all. The TX power on 2m 
is fixed at about 2 watts if I remember correctly and is somewhat higher 
on HF-6 and somewhat lower on 70cm. I found this out the hard way when I 
set up the display just before a contest and then discovered that my 
1296 transverter, which was set up for 10 watts drive, was seriously 
underdriven.

73, CJ K0CJ

Jim Worsham wrote:

> If it is like the 897 (which I suspect it is) the transverter support isn't
> much.  Basically you can program in an offset on the dial so your dial will
> read 222 when the IF is actually 28 for example.  As far as I can tell that
> is all it does.  The TX power, antenna jacks, etc. all continue to work the
> same as they did before.  You can turn the TX power on 28 MHz down to 5
> Watts I believe and possibly even lower on 144 and 432 MHz but certainly not
> the mW level you are looking for.  I know folks who use these rigs as IFs
> for transverters but I believe that they use additional external attenuation
> on the TX or transverters setup for higher power levels.
> 
> 73
> Jim, W4KXY
> 
> -----Original Message-----
> From: owner-vhf at w6yx.stanford.edu [mailto:owner-vhf at w6yx.stanford.edu] On
> Behalf Of Christopher Cox (IMAP)
> Sent: Wednesday, July 30, 2008 9:12 PM
> To: NLRS; vhf at w6yx.stanford.edu
> Subject: [VHF] Fwd: FT-857D Transverter operation
> 
> 
>>Is there any decent (or even basic!) documentation anywahere on the  
>>FT-857D's supposed Transverter support?
>>
>>The user manual contains very little indeed on the subject other  
>>than hinting at how a display offset can be enabled to show the  
>>actual operating frequency when in the transverter mode, and which  
>>antenna port is used for transverter usage.
>>
>>However, there is no indication of whether output power is limited  
>>to a low level as was typical on older HF rigs (~100mV into 50 ohms,  
>>for example) which woul dbe very nice.  Or, as the two antenna ports  
>>can be selected for trasverter use, would antenna A be used with a  
>>28MHz I/F transverter and B for a 144 or 432MHz i/f transverter?
>>
>>I'm hoping to use my spare 857 to drive a 222MHz transverter in this  
>>wekend's UHF contest, but I have found nothing to describe the  
>>interfacing I'm going to have to do.
>>
> 
> 
> Chris Cox, N0UK  -  chrisc at chris.org
> Don't Believe Everything You Think.
>