- Amateur Radio (Ham Radio) Community

Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

Reviews Categories | QRP Radios (5 watts or less) | NS-40 Class E Transmitter by NM0S Help

Reviews Summary for NS-40 Class E Transmitter by NM0S
NS-40 Class E Transmitter by NM0S Reviews: 12 Average rating: 4.8/5 MSRP: $30 (DX $33)
Description: Kit designed by David Cripe NM0S, and made available by 4SQRP Group. The NS-40 Transmitter is an upgraded version of the overall winner in the FDIM 2008 Homebrew Contest. It is a truly unique QRP transmitter design. NS stands for No Simpler, so this is the No Simpler 40 Meter Transmiter.
Product is in production.
More info:
Email Subscription
You are not subscribed to this review.

My Subscriptions
Subscriptions Help

You can write your own review of the NS-40 Class E Transmitter by NM0S.

<— Page 2 of 2

IZ4KBS Rating: 5/5 Sep 29, 2010 09:15 Send this review to a friend
Just one word: great!  Time owned: 0 to 3 months
Beside being an innovative design, this barebones kit works extremely well. I have completed the basic kit in maybe one hour, and then spent another few hours to put it in a nice enclosure and add a crude VXO, for a bit more frequency agility at the price of some drifting during warm-up. Not a problem though, because after the first few minutes the unit stabilizes, and being able to sweep a bit around the band greatly increases the chance of making plenty QSOs. Currently mine covers the 7022.71-7025.49 KHz range, plenty enough for a lot of QRP fun! Pwr is about 8 watts, quite stable over the whole span. Look here to get a feeling:
AB9EI Rating: 5/5 Feb 9, 2009 10:51 Send this review to a friend
Brilliant, innovative design!  Time owned: 0 to 3 months
What an innovative kit! The simplicity of it, from a kit-builder’s point of view, is simply brilliant. I discussed the NS-40 design (inductors etched into the PC board - no toroids to wind) with my weekly HF CATS (“Chatter and Talking Society”) net, and it definitely piqued their curiosity. I am getting about 9-10 watts out at 13.8VDC input, and find the transmit frequency with the 7.30 crystal to be about 7.28 (not a problem). It definitely runs cool, even at 9 watts out. I have inserted two SIP sockets in the board so that the crystals (7.30, 7.40, 7.128 – actual transmit frequency varies by about 20KHz) can be easily swapped. My first contact was with a western NC station. He gave me a 599 – not bad, considering I’m in the Chicago area! I think that this would be an especially rewarding build for a first time kit builder.

My compliments and thanks to David Cripe, NM0S and to the 4SQRP Group for all of the hard work that went into making this kit available.
<— Page 2 of 2

If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager.