More BK Building

My recent 'Building For The BK' blogs have tempted at least one ardent homebrewer, John (VE7BDQ), to dig into his junkbox stash to create a nicely-working BK rig....it's a Colpitts oscillator using a pair of 45's in push-pull. His lash-up is now working and ready to go on both 80 and 40m and he is contemplating 160m operation with it as well....very nice!




1935 ARRL Handbook. Source: http://www.arrl.org/
 
John and I had a nice QSO today on 80m CW and the rig sounds just great. He reports 240 volts on the plates and a current of 58ma. His scope-measured output is just over 8 watts for an impressive efficiency of just over 60%. It appears that the Colpitts-style is much more efficient than the more popular TNT or Hartley oscillators...well at least more efficient than the ones I built!
 

Although John did not have every period-appropriate component available to him, it didn't discourage him from building his BK rig. For too many, this is often a stumbling block that leads to nothing being built....as the boy's of '29 no doubt would  have done, he put something together completely from his junkbox.

It will be super to have another left-coast station in this years '29 Party...and a Canadian station to boot!

Anyone else building for the BK?  ....there's still a few weeks left.


Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

Skeeter Hunt Certificates

The first 3/4ths of the 2014 Skeeter Hunt certificates went out in the mail last night.  I ran out of 9X12 envelopes and will get more. The remaining ten or so will go out Thursday night, as our Tech License exam session is tonight and our monthly South Plainfield Amateur Radio Club meeting is tomorrow night.


If you earned a certificate, it has been noted on the Scoreboard spreadsheet, in the "Notes" column:

 https://docs.google.com/spreadsheets/d/1odmnlTAnQST7FgsEnsItHaT_ZO0e8yZpzLqxcsyGRkY/edit#gid=1768430587

Thanks for your patience, and I apologize profusely for the delay - but hey, like John Lennon said, "Life is what happens when you're busy making other plans."

Look for the Skeeter Hunt to be making an appearance on Facebook in the near future! Oh ..... and there will be at least one change in the rules for next year. Look for that announcement in the Spring of 2015. (Hey, I gotta give you something to look forward to!)

BTW, I want to take an opportunity to mention something about the "QRP - When you care to send the very least!" and the "Skeeter Hunt" items that I offer through Cafe Press.  There's no big markup there - each item is offered at $1 above Cafe Press cost. The proceeds (which ain't much - believe me!) go towards the purchase of ink, paper, envelopes and postage for the Skeeter Hunt certificates. Next year, I am hoping to offer plaques to the top three finishers.

72 de Larry W2LJ
QRP - When you care to send the very least!


Larry Makoski, W2LJ, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].

146-147MHz in the UK – why?

I find it extremely odd that OFCOM has granted access to an additional 1MHz of VHF when the existing 144-146MHz band is grossly under-occupied most of the time. Take a listen 144-146MHz in YOUR area in the UK or elsewhere in Europe. Mostly you will hear white noise!

This is only ad interim, only by NoV to full licence holders, and only in some areas. It is clearly a sop for messing with the microwave allocations. It is very unlikely much new (to radio science) will be gained by this 1MHz allocation. MUCH more would have been learned by a 100kHz allocation around 40 or 60MHz or by allowing UK amateurs free access below 8.3kHz or back onto the withdrawn 73kHz band.

I know it is heresy to say “no, I am not interested” but OFCOM could have done so much better and it has lost credibility in my eyes as a result. I cannot believe allocating this spectrum to radio amateurs serves any useful purpose at all. The RSGB talks about digital TV etc. Sorry, this is rubbish: it is hard enough getting anyone on digital TV on 432MHz and 1296MHz where most ATV activity takes place! I can see perhaps a small handful of people forcing themselves to use this band. On 40MHz, the Es possibilities would have been wonderful.

No, in my humble opinion OFCOM should not have given radio amateurs this band at all. It would really have advanced radio science if they had allocated new, smaller, bands at more interesting places in the spectrum. Let us at least hope OFCOM supports moves internationally to a contiguous new amateur band at 5MHz (60m) at WRC2015 next year. This will be useful in the quieter years to come.


Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

Series Seven Episode Twenty-Three – BABYSTAR – Standalone DSTAR Hotspot (16 November 2014)

Series Seven Episode Twenty-Three of the ICQ Amateur / Ham Radio Podcast has been released. Martin M1MRB / W9ICQ is joined by Leslie Buttersfield (G0CIB) and Chris Howard (M0TCH).. Colin M6BOY rounds up the news in brief, and this episodes feature is BABYSTAR - Standalone DSTAR Hotspot by Martin Rothwell M0SGL


Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Series Seven Episode Twenty-Three – BABYSTAR – Standalone DSTAR Hotspot (16 November 2014)

Series Seven Episode Twenty-Three of the ICQ Amateur / Ham Radio Podcast has been released. Martin M1MRB / W9ICQ is joined by Leslie Buttersfield (G0CIB) and Chris Howard (M0TCH).. Colin M6BOY rounds up the news in brief, and this episodes feature is BABYSTAR - Standalone DSTAR Hotspot by Martin Rothwell M0SGL


Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Moonraker

Ever since the spring when Moonraker supplied me with rubbish patch leads that just fell apart because the crimping was so poor, and a dual band VHF/UHF yagi antenna that had to be glued to fix one of the loose elements, Moonraker has not been my favourite supplier. They clearly did zero quality checks on the goods sold. I hope they have improved.

However they have some nice 10m radios at sensible prices including a 20W FM/AM unit for under £100 and a multi-mode 10m rig for under £150.

See http://www.moonraker.eu/ .

UPDATE 2200z:  Moonraker also supply PMR446 and LPD433 dual band transceivers. The latter band is within the 70cm amateur band, which is perfectly legal at 10mW with no amateur licence, here in the UK. On UHF, 10mW goes a long way from a local high spot. See http://www.moonraker.eu/professional-radio-and-446/pmr-446 . There are several to choose from.

http://www.moonraker.eu/media/catalog/product/cache/1/image/602f0fa2c1f0d1ba5e241f914e856ff9/S/L/SL-02_big.jpg


Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

Searching the log for familiar faces

I have been using LOTW as my online logging program for some time now and for the most part have liked using it. The logging programs I have on my PC are N3FJP's AClog and DXlabs log and both logs have made uploading to LOTW very easy with just the push of a button. For some reason I was on LOTW and I decided to search my log for possible fellow bloggers I made contact with. Low and behold it turns out that I contacted the following fellow bloggers…….W2LJ, EI9KC,AE5X and KL8DX. It's not many and may not be all but I sure was surprised that at some time in the past (some contacts were made before I got into blogging) I made on air contact with these fellow bloggers.



Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

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