Well done Martin @DK3IT and Ondra @OK1CDJ.
I bought 4 and very happy with testing so far.
73 de Pedro, CT1DBS/CU3HF
Hi Martin
I ordered the kit from Hamshop for about three weeks. It is the perfect accessory for the Monutain Topper MTR3!
Many thanks to Martin and Hamshop!!!
vy 73 de Matt HB9FVF
2 Likes
Can you please post the link?
Hi Barry
is already above but:
vy 73 de Matt HB9FVF
Thanks Matt!
1 Like
Actually that link also comes up in Czech until you click on the Union Jack flag 
at the top right of the screen.
73 Ed.
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Mounted a tinySWR in my MTR3 the same way…
I couple this with an EFHW tuner built into a dental floss case. Also visible are the two posts which serve as the paddle of a built-in touch keyer. I log using a small card clipped to the back of the radio. In this way sitting down (usually not a good idea) isn’t necessary. A tethered spacepen (stores in an attached soda straw) serves as writing instrument.
- Fred KT5X (aka WS0TA)
11 Likes
Martin,
The Mouser list has 3 components that are out of stock with long lead times. Could you have a look at that list and suggest replacement components if possible. I have the boards, just need the components.
HNY and 73,
Mike AD5A
NanoVNA is a good option once you run through the menu a couple times. It takes 1-2 minutes to change bands and check SWR. It will also show instant feedback to changes made to antenna.
I’ve learned with my Mountain-Toppers/TrailFriendly End-Fed Half-wave if the setup is generally the same (sloper far end 20’ above ground) SWR is pretty consistent. When checking SWR If 40m is good - 20m will be good also.
Erik
KE8OKM
2 Likes
Hi,
can you please specify the components with availability issues?
Thanks!
73 de Martin, DK3IT
Hi Barry. Here is a photo of the tinySWR built into an MTR5B, upper left. Also built it into my MTR3. - Fred KT5X / WS0TA
2 Likes
Here is the Mouser project list link, https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=7968437adc
The components out of stock are:
Resistor - SMD 820 OHM 1/8 watt
Zener Diode 3.3V 600 ohm
Metal Oxide Resistor 100 ohms
73 and HNY,
Mike AD5A
1 Like
Hello, colleagues =)
I want to build TinySWR indicator on prototype board. I have FT23-43 cores, but them looks very small and hard to wind in my case.
Also I have FT-50-43. It seems like I am able just replace small core with bigger one without changing number of turns.
Is this assumption correct?
br,
Yury
1 Like
Yes, 73 Chris
1 Like
There is another option
73 Armin
2 Likes
Hello 
again DR OP 
I am building TinySWR by my own (without kit).
I gathered almost all parts except D1 and D2.
It would be great if you suggest DIP mount alternatives or SMD for D1 and D2 because I am not able to find these parts.
Thank you in advance!
1 Like
If you want to build the indicator with non-SMD components, you can always use the original design by Hans Steinort (DF3OS) from
http://sem.pl/sp5jnw/konstrukcje/atudf3oshtm/atudf3oseng.pdf
The TinySWR circuit is based on that design, with improvements from Dieter Engels (DJ6TE) and Hannes Hiller (DL9SCO).
I only changed the values of certain components, modified the LED array, and designed a SMD PCB so that it is easier to assemble.
Hope that helps.
73 de Martin, DK3IT
3 Likes
Thank you, Martin
This helped a lot.
Now it is clear for me that it’s a regular zener diode with voltage 3.3V.
In original version it was 2.7V (2V7).
Sorry for stupid question.
I think I start with original version with two led SWR indicators.
1 Like
The last question,
Probably someone has better knowledge =)
Why line voltage indicator was moved from “hot” line to secondery winding of current transformer?
I have compiled a list of the parts at Reichelt:
2 Likes