Eccosorb microwave absorber

[g4saq]

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

[G1BVI]

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

[G1BVI]

Meant GDS not DDD

[g4saq]

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

[G1BVI]

[g4eml]

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

[FRANCOIS F1CHF]

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

[g4saq]

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.

[g4eml]

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.

[g4saq]

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