Scabbard inductor value

[Tremster]

How crucial is the value of the inductor (8.2uH) on the Scabbard?
For some reason none of the shops where I usually buy stock a 8.2uH, only 6.8uH and 10uH. Could I use one of those? Which one?
Thank you.

 

[temol]

Post in thread 'What's on the workbench?'

Dec 28, 2025

Also building the EAE Dagger; at first I thought the 8u2 pad was for a 8.2k resistor, realized it was an inductor, ordered one and received the oversized inductor on the table, ordered a second one…still oversized

I used a jumper wire, but ....

https://www.taydaelectronics.com/8-2uh-inductor-ec24.html

• Robert

• 

 

[Tremster]

Thanks. I'm aware of Tayda, but still: would a 6.8uH inductor work here?

 

[jwin615]

Well, it forms a 19.4 Ghz LPF.
A 6u8 would be 23.4Ghz, so yeah, should work.
Maybe even get better wifi signal.
Or just use a jumper, or a ∅R

 

[temol]

Thanks. I'm aware of Tayda, but still: would a 6.8uH inductor work here?

I wasn't referring to Tayda, actually. I was referring to using a jumper instead of an inductor. If you plug these values into an LC filter calculator, you'll get the filter's GHz cutoff values.

 

[W8ST ARTS]

Funny you brought this up, Im also building the scabbard. I cant tell you what to do, but ill tell you what not to do. At first glance I thought it was an 8k2 resistor, wondered why a resistor would be sitting solo and thats when I saw it was an inducer (I have no idea what it was) so I ordered one on Digikey and received the piece of machinery you see on the table, so I ordered a "smaller" one and ended up with the rad looking thing i soldered onto that quadrant of the pcb. Will it do the job? IDK..we'll find out soon.

 

[Erik S]

I haven't built mine yet, but I did order the specified part, because I am a follower-of-instructions.

Is the consensus that this seems to be a do-nothing part?

John at EAE seems more like the kind of designer who went to college and does the math, as opposed to the folks who are just throwing random stuff at the wall to see what sticks (I'm a fan of some of them too). Just not a guy I'd expect to be dropping nonsense into his circuits.

 

[pricklyrobot]

It does indeed appear to form a passive RL low-pass filter, with a bizarrely high cut-off frequency far outside the range of human hearing, not to mention anything that might be present in a guitar signal…

I’d be interested to hear someone speculate as to any reason it might be there

 

[Tremster]

Thanks everyone. I'll try the 6.8uH.

 

[jwin615]

I haven't built mine yet, but I did order the specified part, because I am a follower-of-instructions.

Is the consensus that this seems to be a do-nothing part?

John at EAE seems more like the kind of designer who went to college and does the math, as opposed to the folks who are just throwing random stuff at the wall to see what sticks (I'm a fan of some of them too). Just not a guy I'd expect to be dropping nonsense into his circuits.

Perhaps he was banking on the pF capacitance of the guitar cable for forn a LRC filter?
But may app-math doesn't align with that theory either.
Or maybe he found some high freq oscilations in his builds/layouts. Who knows? But I bet if someone took the time to ask, he'd be willing to share. I believe he has lurked around here before.