BPF 2m

M0NDE · Post by **M0NDE** » Thu Jan 08, 2026 6:04 pm

Is the QRP Labs 2m filter a good choice to put between the Portsdown Pluto and a suitable amplifier for 2m experimentation?

Thanks

Nigel M0NDE

G7JTT · Post by **G7JTT** » Thu Jan 08, 2026 8:50 pm

Check out these videos

https://youtu.be/iLZUKnzKSlg?si=KSeJAZY5amkm6UZC

https://youtu.be/AwU2jcANmls?si=bAgDcPO6k2e7VhzL

both a good watch

73 John G7JTT

M0NDE · Post by **M0NDE** » Sat Jan 10, 2026 8:55 am

Thanks John
I met the "Vic" in the bar at GQRP Convention.
I had also seen these videos prior to my question.
I guess I will have to order one and give it a go.
73 Nigel M0NDE

radiogareth · Post by **radiogareth** » Sat Jan 10, 2026 5:11 pm

I'd just include one after the PA, there are some nice cheap amps that re-use MRF186 ('Linear PA' on Ali Express) devices and the PCB includes a filter and VSWR sensing, they go very well on 2m. There area also 70cms versions too and other amps that use a small brick PA and predriver that do 5W DATV on 70. Perfect for local use.
If you fancy a DIY then W6PQL has excellent filter designs for QRO on his website. https://www.w6pql.com/filter_+_coupler_+_detectors.htm
If you used 500V silver Mica caps (or better ATC ones) you would be fine on 2m power levels.
Gareth

radiogareth · Post by **radiogareth** » Sat Jan 10, 2026 5:59 pm

https://www.aliexpress.com/item/1005001 ... in_prod%3A

M0NDE · Post by **M0NDE** » Sun Jan 11, 2026 12:07 pm

Thank you Gareth for the link. On my next pension day I will order one of these kits for 2m.

73 Nigel M0NDE

G7JTT · Post by **G7JTT** » Thu Jan 15, 2026 7:58 am

Just found this on the BATC Wiki

https://wiki.batc.org.uk/images/b/be/2m ... -YU1LM.pdf

John

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