[AMRadio] Tansmitter power reduction (Ranger)


Larry Szendrei 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/NE1S

Larry Szendrei wrote:

> John,
> 
> 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).
> 
> 73/GL,
> -Larry/NE1S
> 
> 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 
>> joke
>> in Spinal Tap - "This amp was custom made for me - see? the knobs all go
>> to *11*!!!"
>>
>>  Cheers
>> 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 20 Oct 2017.