Microphonics in VF14 and U47

[rock soderstrom]

I have a Psophometer (Rohde & Schwarz UPGR) where I can switch between different input/loading impedances (1Meg, 100k, 10k and 600 Ohm).

Nice!

this one?

https://www.radiomuseum.org/r/rohde_nf_geraeuschspannungsmesser_psophometer_upgs.html#

Edit:

I guess its this one - UPGR Modell

https://bw-schmitti.de/Rohde-amp-Schwarz-NF-Geraeuschspannungsmesser-Psophometer-UPGS/1100000537


Cooler Scheiß!

 

[Murdock]

Nice!

this one?

https://www.radiomuseum.org/r/rohde_nf_geraeuschspannungsmesser_psophometer_upgs.html#

Edit:

I guess its this one - UPGR Modell

https://bw-schmitti.de/Rohde-amp-Schwarz-NF-Geraeuschspannungsmesser-Psophometer-UPGS/1100000537

View attachment 140959
Cooler Scheiß!

Yes, pretty great device! You can sometimes get them for reasonable prices on eBay. Much less than on bw-schmitti. I think I paid around 130,- Euros.
The UPGR has a higher bandwidth up to 100KHz compared to the 20KHz of the UPGS. And there are other small differences I forgot now.

 

[rock soderstrom]

Yes, pretty great device! You can sometimes get them for reasonable prices on eBay. Much less than on bw-schmitti. I think I paid around 130,- Euros.
The UPGR has a higher bandwidth up to 100KHz compared to the 20KHz of the UPGS. And there are other small differences I forgot now.

That sounds good, I'll keep an eye on it!