Jeff - on my AA600, an OSL calibration is good until you change the parameters of the calibration, i.e. moving away from the frequency/range selected during the OSL calibration process.
I'm just assuming the others are the same. 73 Matt AK4MK On Wed, Dec 13, 2017 at 10:49 AM, Jeff Blaine <[email protected]> wrote: > Question regarding the OSL cal function on the unit. > > Let's say you do an OSL cal with a length of coax attached just as you > would with a generic VNA. For how long is that specific OSL CAL applied? > > I mean, does it persist until it's deleted, or until you change frequency > away from the range covered by the original OSL CAL? Or until it is > powered off? Or what? > > Thanks! > > 73/jeff/ac0c > www.ac0c.com > alpha-charlie-zero-charlie > > > On 12/12/2017 5:41 PM, Dennis W0JX via Topband wrote: > >> All: >> I have been working on installing a tower detuning circuit on my 80 foot >> shunt fed tower. Of course I found had that the MFJ 259B to be totally >> inadequate for adjusting the detuning circuit because of nearby BC RF on >> 1520 Khz. Results did improve with the insertion of a 1510 Khz trap built >> for me by KD9SV but results were still inconsistent. >> >> I finally decided to buy a Rig Expert but had trouble deciding between >> the AA-55 and the AA-230. The AA-230 covers 2 meters but that is not of >> great interest to me. Another nice feature is the TDR graph function. >> However, I discovered that the AA-55Zoom also has a TDR function but it >> does require a connection to a laptop to use it effectively. >> >> The deciding factor for me was the AA-55 performance on 160 meters. I >> found a review by W9AC who said that the AA-55Zoom is basically >> bullet-proof on 160 meters. >> >> I ordered my AA-55 from DX Engineering and had it delivered in one day. I >> am thrilled with the performance. I find that the most useful screen is the >> one called "All Parameters" which shows all important factors. This is >> extremely useful for putting the antenna or circuit right where you want >> it. There is also a set of cable tools which make it very easy to cut >> quarter-wave or half-wave stubs. >> >> One thing - make sure that you use the "battery saver" function or the >> batteries won't last more than 4 hours. >> >> 73, Dennis W0JX >> Milan, OH >> _________________ >> Topband Reflector Archives - http://www.contesting.com/_topband >> >> > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
