[Elecraft] FOR SALE

[Michael Ortlieb]

I have for sale a very nice KPA-500, looks very good works as it should.
$1995.00  We will be at Hamvention next week. Prefer Cashier's check or MO.
contact KN9P off list, good on QRZ. 920-853-7073
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] Experience with Energizer Lithium AA Batteries?

[Walter Underwood]

Thanks. Looking at the data sheets, the Energizer lithium's internal resistance 
is "120 to 240 milliohms (depending on method)” and for the Eneloop Pro, the 
internal impedance is “Approx. 25 mΩ (at 1 kHz)”. Not really the same spec, but 
the ESR is probably similar to those numbers.

Also, the max discharge for the lithium AA cells is 2.5 amps continuous or 4.0 
amps pulse (2 sec on / 8 sec off), so that should be fine for running the KX3.
 
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On May 11, 2023, at 5:25 PM, Matthew Cook  wrote:
> 
> Walter,
> 
> Like all primary cells they do have some ESR which is a little higher than 
> other secondary cell chemistries.   
> 
> Like Julia I have pushed these cells towards 1A/cell at -30 celsius and 
> achieved reasonable results and the load curve is very flat.
> 
> The additional terminal voltage is good for overcoming some of the ESR 
> problems at high load, but if the final amplifier is prone to distortion or 
> AM modulation due to voltage drop then things get a little more difficult.
> 
> The proof is in the pudding, so I'd simply purchase a set, place your 
> multimeter across the cells (maybe use a RF choke if TX not into a dummy 
> load) and watch the terminal voltage when you TX with your desired 
> modulation, you'll quickly know if you have a problem.   
> 
> If your experiment is unsuccessful the E2 energisers go forever in your 
> remote controls and wireless mouses, they will certainly not be wasted !
> 
> 73
>  
> Matthew
> VK5ZM
> 
> 
> On Fri, 12 May 2023 at 02:15, Walter Underwood  > wrote:
>> Thanks, that is actually on the data sheet, now that I look.
>> 
>> https://data.energizer.com/pdfs/l91.pdf
>> 
>> My biggest concern is whether they hold up under a 2+ A current draw. The 
>> data sheet stops at 1 A.
>> 
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>> 
>> > On May 9, 2023, at 9:10 PM, Matthew Cook > > > wrote:
>> > 
>> > Walter,
>> > 
>> > These cells have a slightly higher terminal voltage 1.82 c.f 1.65 (when 
>> > full) from your normal heavy duty alkaline battery... flat is still the 
>> > same at 1.0V under load discharge curve is what you'd expect under 
>> > moderate/high loads.   
>> > 
>> > We regularly fly these (and only these cells) in our high altitude balloon 
>> > experiments at reasonable currents (> 200mA), so at temperatures below 
>> > zero celsius (+32F) they still have significant usable capacity.   They 
>> > will certainly give your Enerloops a run for their money.
>> > 
>> > 73
>> > 
>> > Matthew
>> > VK5ZM
>> > 
>> > 
>> > On Tue, 9 May 2023 at 06:04, Walter Underwood > >  > > >> wrote:
>> >> I’m considering taking Energizer Ultimate Lithium AA batteries 
>> >> (non-rechargeable) in my KX3 on a backpacking trip. They are half the 
>> >> weight of Eneloop Pro and have about 40% more Watt-hours of energy.
>> >> 
>> >> Anybody tried these? How did they work?
>> >> 
>> >> wunder
>> >> K6WRU
>> >> Walter Underwood
>> >> CM87wj
>> >> http://observer.wunderwood.org/ (my blog)
>> >> 
>> >> __
>> >> Elecraft mailing list
>> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> >> Help: http://mailman.qth.net/mmfaq.htm
>> >> Post: mailto:Elecraft@mailman.qth.net  
>> >> >
>> >> 
>> >> This list hosted by: http://www.qsl.net  
>> >> 
>> >> Please help support this email list: http://www.qsl.net/donate.html
>> >> Message delivered to vk...@bistre.net  
>> >> >
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft@mailman.qth.net 
>> 
>> This list hosted by: http://www.qsl.net 
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to vk...@bistre.net 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com 

Re: [Elecraft] K1 power output

[Ingo Meyer DK3RED]

Hello Dave,



I have a K1 that I’m looking to sell, and took a look at the power output 
before listing it.  Power output is as follows:

40 meters 5.2 watts
30 meters 4.5 watts
20 meters   1.3 watts
17 meters 0.7 watts

These are obviously not the expected power output levels.  Power supply voltage 
= 12.8 volts.  Output set to 7 in the menu.

What type of fault would this indicate?


All components for the filters for 40 meters and 30 meters filters are located between 
same contacts sides of K5A/K5B and K6A/K6B. The components for 20 meters and 17 meters are 
located all on the other sides of these relais contacts.


I therefore advise you to check the contacts of these relays as a first step. If you have 
switched the K1 to 40 meters or 30 meters, zero ohms should be measurable with an ohmmeter 
across the contact.



73/72 de Ingo, DK3RED - Don't forget: the fun is the power!
www.qrp4fun.de - dk3...@qrp4fun.de
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com