2 Giga Ohm resistors where to buy?

[rock soderstrom]

Hi guys, where do you buy your 2G Ohm resistors for microphones? Is there also a source in Germany or Europe? Which products/manufacturers do you favor?

 

[Khron]

Mouser has relatively cheap 1G resistors, at least (and free shipping for over 50e orders).

Is the 2G value that critical?

 

[LevinGuitar]

Up to 5g:

https://aliexpress.com/item/1005003588041883.html?

 

[rock soderstrom]

Up to 5g:

https://aliexpress.com/item/1005003588041883.html?

Thanks, link doesn't work for my location. I found another seller with G Ohm resistors on aliexpress but with long delievery time (middle of october) so a source in europe would be better.

Mouser has relatively cheap 1G resistors, at least (and free shipping for over 50e orders).

Is the 2G value that critical?

I know the Mouser offer, I don't know how critical the 2G is. It is for the Miculli SDC circuit.

https://groupdiy.com/threads/a-very-versatile-input-stage-for-sdc-mics.80172/

 

[RuudNL]

https://nl.mouser.com/c/passive-components/resistors/?resistance=2 GOhms

 

[rock soderstrom]

https://nl.mouser.com/c/passive-components/resistors/?resistance=2 GOhms

Thanks. Mouser seems the only western source.

 

[soapfoot]

Digikey looks to have several

https://www.digikey.com/en/products...YC2AziALrEAOmUIAVQB2AS0z0AZgFl8AQ1a5s+EAF81QA

 

[MicUlli]

One very tricky but working solution:
Replace the 1 or 2 or x G resistor with two antiparallel collector-base-diodes of npn transistors like BC549C.
Requirement is that the antipar CB-junctions are embedded in a bootstrap path of the circuit. Othewise THD will rise verty quickly.
Advantage: very high resistance and therefore very low 1/f noise.

 

[rogs]

TE Connectivity seem to offer the best value 1G resistors, and their component is a standard thru hole style package --

https://uk.farnell.com/te-connectivity/rgp0207chk1g0/res-1g-10-250mw-axial-thick-film/dp/2805261
So cheap and small enough to put 2 in series to create a 2G part.....

 

[rock soderstrom]

So cheap and small enough to put 2 in series to create a 2G part.....

Yep, that's a good source. Thanks a lot!

Digikey looks to have several

Thanks soapfoot!

One very tricky but working solution:
Replace the 1 or 2 or x G resistor with two antiparallel collector-base-diodes of npn transistors like BC549C.
Requirement is that the antipar CB-junctions are embedded in a bootstrap path of the circuit. Othewise THD will rise verty quickly.
Advantage: very high resistance and therefore very low 1/f noise.

That's interesting, I have never heard this before. I am still learning. Thanks a lot Ulli!

BTW, Banzai got some 1G resistors but way more expensive (6,23€-13,25€ each!). Could be an option for us Berlin people if you need it as fast as possible. (local pickup, no shipping cost)

http://www.banzaimusic.com/search.php?mode=search&page=1