Multi band end fed half wave(EFHW) for 80m-10m

EFHW_Diagram courtesy of G0KYA

I recently came across a design for a multi band end fed half wave antenna for 80m-10m by G0KYA link here. Essentially its an EFHW cut for 40m with a trap(110uH) and an additional 2 – 2.5m of wire at the end for 80m. I already had a 49:1 autotransformer / matching unit from RF Comms ebay shop. I mounted the wire in an inverted L configuration, a little fine tuning was needed but I ended up with an antenna that is usable on 80, 40, 20, 15 & 10 without an ATU and other band inbetween with an ATU.

SWR measurements:- 80m 1.7, 40m 1.2, 20m 1.6, 15m 1.8, 10m 1.9

I’ve had contacts in every continent with this antenna albeit on digi modes such as FT8.



Celebrating World Amateur Radio Day

April 18th 2020

Operating from April 18th at 00:00 UTC to April 19th at 23:59 UTC

Mainly operating FT8 & FT4 on 40m through to 6m

World Amateur Radio Day

*Note logs will be updated after the event has finished*

Due to the current Covid-19 pandemic QSL will be via eQsl only.

Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on this day in 1925 that the International Amateur Radio Union was formed in Paris.

Amateur Radio experimenters were the first to discover that the short wave spectrum — far from being a wasteland — could support worldwide propagation. In the rush to use these shorter wavelengths, Amateur Radio was “in grave danger of being pushed aside,” the IARU’s history has noted. Amateur Radio pioneers met in Paris in 1925 and created the IARU to support Amateur Radio worldwide.

Just two years later, at the International Radiotelegraph Conference, Amateur Radio gained the allocations still recognized today — 160, 80, 40, 20, and 10 meters. Since its founding, the IARU has worked tirelessly to defend and expand the frequency allocations for Amateur Radio. Thanks to the support of enlightened administrations in every part of the globe, radio amateurs are now able to experiment and communicate in frequency bands strategically located throughout the radio spectrum. From the 25 countries that formed the IARU in 1925, the IARU has grown to include 160 member-societies in three regions. IARU Region 1 includes Europe, Africa, the Middle East, and Northern Asia. Region 2 covers the Americas, and Region 3 is comprised of Australia, New Zealand, the Pacific island nations, and most of Asia. The International Telecommunication Union (ITU) has recognized the IARU as representing the interests of Amateur Radio.

Today, Amateur Radio is more popular than ever, with more than 3,000,000 licensed operators!

World Amateur Radio Day is the day when IARU Member-Societies can show our capabilities to the public and enjoy global friendship with other Amateurs worldwide.


Taken the decision to close down MB6IDR permanently. 

It wasn’t any easy decision to make but total lack of support from local local amateurs is the reason behind it closing. 

The hardware may go up for sale at some point.


MB6IDR Update

Just a quick update on MB6IDR, Around 1 month after becoming operational. a serious fault developed with the node radio. this was replaced with a Tait TM8250 which has been running perfectly every since, In fact it is better than the Motorola GM340 it replaced! bit error rate is much better usually 0.0 to 0.1%

Apart from the hardware update. there has also been an updated the Pi-Star software and now FCS reflector access is available. see MB6IDR qrz page for more info.

finally a couple of pics of the node hardware:- Tait TM8250 + an STM32-DVM v2 from repeater builder/ N3XCC

MB6IDR Operational

MB6IDR Located in Dewsbury, West Yorkshire


Simplex gateway connected to Brandmeister DMR and YSF open source reflector system.

TX/RX 431.1625 colour code 5, time slot 2.

To use the reflector system on Brandmeister, all you need programmed into your radio is TG9, time slot 2, with colour code 5. to connect to a reflector go into contacts, manual dial, type in the number you want and then press the ptt for about 1 second. to disconnect use 4000. talkgroups can also be used.

After 10mins of inactivity, MB6IDR will return to reflector 4400

A full list of BM talkgroups and reflectors can be found here

The C4FM/Fusion part of the node works the same as accessing WiresX on a Yaesu repeater/node, the only differnce being is the rooms available differ from those on the Yaesu system.

A full list of YSF rooms can be found here

Finally after 30 seconds of no activity on either mode, both modes will be available again.



MB6IDR is only licenced for attended operation

any questions or reports please contact Paul M0XZT.

New website

Moving my Blog from another provider. right now im not sure if i’ll be copying posts over from the old website. might copy the post content over, but leave the images off.

either way more content will be added soon.

73 de Paul M0XZT