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Jim I agree with you regarding the lowest number of turns. My theory is that the relay contacts are acting as the primary of a current transformer inducing the RF current flowing in the contacts into

Tom - great link, thank you. Do you recommend I wait a while, or is this part good to go? Senior folks in my club bash me 'bout my spurious emissions. They have strongly encouraged me to "work on that

GM Jim, 400mW is 33mA that should be OK for the transistors. I will try lower current one when I find a cheaper source or a vendor who will send me by USPS.

The parts in the photo appear to be these parts: https://www.budgetronics.eu/index.php?action=article&aid=13200&lang=EN Not sure they are Murata parts. I would concur that a part marked ‘681k’ is

That is 680nH or 68 followed by one 0 - uH would have been 684 marking IMHO - like resistors. I measured them and they were exact 680nH. In some places the discussion relating to 680uH is about

Raj, I thought the same thing, but maybe, even using sockets, just for the experiment, I could get some relative comparisons between the types to see if any were better than others. I suspect the

Am 14.10.2018 um 03:34 schrieb Joe Puma: In some postings are mentioned 680uH inductors in some 680nH. uH or nH?? I had a look at the picture in Raj's posting #60465 and read there 681K. This would

The learning module referenced is an excellent source for ALL electronics theory. Add it to your home page. This winter when it is too nasty to go outside and you are tired of making contacts you can

In ricezione: su 40mt con impostazione di default Lsb non si riesce a rendere intelligibile la conversazione, impostando Usb tutto bene. Sui 20 mt il contrario. In reception: on 40mt with default

Lev, Any experiments on this ?

Tim, Looks like you 12V is not OK. Increase to 15V and see. I have run my boards on 15V with much better output. If the power goes up and then settles back down, I suspect your 12V not sustaining

I've only recently got my bitx40 working after replacing a bad Arduino board and an end fed antenna with a good Nano and a sloping dipole.Plenty of ears but zero contacts until this weekend. I'm in

Jim, My take on this relay business is that both contacts are being inductively coupled. Imagine the NC contacts on one side - it is a loop and will be inductive. The same goes for the other pair on

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