|[AMRadio] Tansmitter power reduction (Ranger)|
ne1s at neandertech.com
Wed Nov 23 13:10:53 EST 2005
Please pardon the time warp - I guess that last one has been sitting in
my "Unsent Messages" folder for a while.
Larry Szendrei wrote:
> I've run the Ranger PA of the LV B+, as indicated in a previous post,
> with no overstressing of the supply. Then again, the power supply in my
> Ranger is non-original - different XFMR, and solid-state rectifiers in
> the "economy" hookup for low and high B+. The rig was a bsket case when
> I got it, and I've never laid eyes on the original power xfmr. That
> said, the xfmr in there appears no beefier than the original, perhaps
> less so.
> I know for a fact Timtron (WA1HLR) also has had experience running the
> Ranger PA off the LV B+, and he advocates this method to anyone wishing
> to drive an amplifier with the Ranger.
> One thing - The PA plate current meter won't read when doing this -
> unless you change the wiring in the radio, as I did, so that it reads
> when either the HV B+ and LV B+ supplies are employed. Alternatively,
> you can add an external meter without taking the Ranger out of the
> cabinet (in series with the appropriate pins on the accessory plug).
> John Lawson wrote:
>> On Wed, 16 Nov 2005, John Coleman ARS WA5BXO wrote:
>>> I don't know if the power supply come from the same XFMR or not but what
>>> does "10 on the knob" mean?
>> In the Ranger, the LV feed to it's rectifier is from two equidistant
>> taps between CT and the 'ends' of the HV secondary, the which ends
>> feed the HV rectifier. I'm a bit worried that if I run the whole
>> radio on the LV winding, it will stress it. If anyone has any concrete
>> "real-world" actual experience with doing this, I'd love to hear how
>> it worked out.
>> Guitar (and other musical) amplifiers traditionally have their volume
>> knobs marked 0 - 10, thus '10' is 'loudest'. From whence derives the
>> in Spinal Tap - "This amp was custom made for me - see? the knobs all go
>> to *11*!!!"
>> John KB6SCO
>> AMRadio mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/amradio
>> Help: http://mailman.qth.net/mmfaq.html
>> Post: mailto:AMRadio at mailman.qth.net
>> AMfone Website: http://www.amfone.net
>> AM List Admin: Brian Sherrod/w5ami
> AMRadio mailing list
> Home: http://mailman.qth.net/mailman/listinfo/amradio
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:AMRadio at mailman.qth.net
> AMfone Website: http://www.amfone.net
> AM List Admin: Brian Sherrod/w5ami
More information about the AMRadio mailing list
This page last updated 21 Feb 2018.