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Tom, What I bought from the Bay stated as Murata does not seem to be right. The inductor has S.M printed on it. I say try one that has the right value and SHIELDED. That should keep it from picking up

Since it has been proven that there is coupling between the relay solenoid coil and the long relay armature (apparently a lot more on the non Axicom relays) .....what can be done with the original

Anybody?

Check Arrow.com. a lot cheaper. I bought 10ea "1276AS-H-R68M=P2" 680nh smd inductors for $3.41. I also bought 5ea of the "V23105A5403A201" relays for $11.57. With tax and FREE overnight shipping, i

This popped up on Amazon when I searched for 1210 680nh https://www.amazon.com/Fixed-Inductors-680nH-145mA-pieces

Wow...I just read my description above and it's pretty bad!? ?But the link is really good :)

Here's my obligatory "I'm no expert, but.." statement.? ?I'm no expert but I bet what's being done here is an "LC" filter or "Inductance / Capacitance" filter.? Or perhaps an enhancement of the

Don, The closest to a recommendation of an actual part is this: https://www.mouser.com/ProductDetail/Murata-Electronics/DFE322512F-R68M%3dP2?qs=sGAEpiMZZMsg%252by3WlYCkU5FHiQf6D01SsmDAMibaD%2f0%3d

Folks, is there a recommended source for the 680uh inductors?? I've looked over the thread, and don't see any references. But I may have missed it?? If this were added to the wiki, it would be

Just a hobbyist here so keep that in mind. The link I sent previously is to what could be similar to the toroid in question, no guarentees. The link has the application notes for that toroid which

Thanks Raj Good night from here and good morning to you in India Lawrence

I've looked over that 181 page AXICOM spec sheet and there are 2 things that set them apart from the herd. Common with the herd: they are "Signal Relays", 2pF between contacts, 4pF to the coil, have

Mike, let me add my thanks as well. ?Your detailed, concise info is exactly what I needed. ?Warmest 73, ?Chuck N1KGY

Thank you for the links to the calculators.? The part I don't understand is what frequency range I'm trying to filter.? The choke that Akira JJ1EPE calls for goes in the power supply line for the

Looking at the differences between the original Hongfa relays -S (for sensitive) version in my uBITX boards and the Axicom relays Mike Doty and I installed in place of them, the Axicom had lower coil

Yes I agree. Thanks Mike. Between your site and the wiki I was able to get a wealth of information and perform the mods without having to be a rocket scientist level electrical engineer. Kudos to

good evening I have a problem with a BITX40 that never worked! I replaced the motherboard because I thought the problem was there. It is not so! Only the raduino remains! I wrote an email to

Mike, Now THAT spec from Farnell was what I was looking for.? The 151 pages have a lot of good RF information not found elsewhere.....but will take a little time to digest. 73 Kees K5BCQ

The original on the my test board toroid inductance was `560nH and I added another 2 turns.. to make it nearer to 720nH as stated. not helped! Shielding did not help.

Did anyone check whether there is any difference in the attenuation with the different Axicom relays? What I mean is that according to some posts it appears that the relays have different