[Elecraft] Camping radio ops: then and now

[K9MA]

Hi John,

Links to regulator and tuner schematics:

http://sdellington.us/hr/KX-1_regulator4.pdf

http://sdellington.us/hr/EFHW_Tuner2.pdf

  A couple notes:

I had some trouble with the LT1965 regulator oscillating, probably due 
to the lead inductance of the leaded (non-smt) capacitor I used, hence 
the LC network.  The MIC29150 regulator data sheet claims it works with 
all capacitors, though I haven't tried it. If the MIC29150 is used, the 
LC network is replaced with a short. The way I wired the regulator to 
the KX1 required cutting a trace on the PWB, so the power could be 
switched ahead of the regulator.  This prevents the regulator from 
discharging  the battery when the KX1 is off.  If you prefer not to cut 
the trace, you could wire the batteries to the regulator input through a 
connector, and just unplug that connector when you're not using the KX1.

The tuner is based on the Pacific Antenna BLT+, using most of the same 
parts.  I bought the BLT+ kit without the case, replaced the 
transformer, and put it in my own box.  The kit includes the N7VE SWR 
bridge.  Note that my version is only intended to match end fed half 
wave multiples, with impedances from about 1,000 to 6,000 Ohms, and it's 
strictly QRP.

73,

Scott  K9MA


On 10/4/2016 13:04, John Ellsworth wrote:
> Scott - I also have KX1. I have not taken it on bike trip yet, but it
> does come along in the camper a lot.
>
> I'd be interested in the details of your regulator and tuner.  Thanks
> for posting the note in the forum.
>
> 73 de JohnE/kd0nqc
>
> On 10/04/2016 11:54 AM, K9MA wrote:
>> For what it's worth, here's my recent solution for bicycle portable
>> operation:
>>
>> http://cwt1605k9ma.blogspot.com/2016/08/equipment.html
>>
>> It weighs a bit more than Wayne's station, but I don't need trees to
>> hold the antenna up.
>>
>>
>> 73,
>>
>> Scott  K9MA
>>
>>


-- 
Scott  K9MA

k9ma at sdellington.us