BATC Forum

I am going to need some microwave absorber material for a high power 23 cms SSPA that I am building (W6PQL design). The designer used 'Eccosorb' but that is eye-wateringly expensive! I wonder if anyone knows of a suitable alternative, please?
Russ

Guessing you need eccosorb GDD-U-SA
?
I have a small piece 150mm x 40mm x 0.76mm
73
Nick

Meant GDS not DDD

Thanks Nick. I'll check out the spec. with W6PQL. However, I fear I'm going to need a lot more than you have. That's why I wondered if there is a cheaper option.
73, Russ

I (and others) have had some success using 'Microwave Plate Warmers' by Waveware which can be found on Amazon and eBay etc.


They are made of a rubber material that appears to be impregnated with carbon or iron. Obviously intended to absorb power at 2.4GHz but as far as I can tell there is no frequency sensitive part to their design.

Some people also suggest using antistatic foam but that has never been very successful for me.

Colin G4EML

have alook here
https://www.rf-microwave.com/en/microwa ... rials/377/
francois F1CHF

Colin - what a clever idea! Do you mean this sort of thing? Ebay ref 386362653167


Francois - thank you for the link, I am grateful. It looks as though the min. frequency is 1.5GHz and they are still expensive for a big piece!

73,
Russ.

The ones I used were the black rubber type with the three circular 'ears' around the outside.

https://www.ebay.co.uk/itm/285783064739

They have several large plain areas that can be easily cut into usable shapes.

I am not sure what the performance would be like at 1.2GHz but they might be worth a try.

Colin.

Thanks Colin. As you say - worth a try.
Russ.