Good points Bob. I just leave my filter test jig wired up in a cardboard box since it's about the only thing I use my NanoVNA for. So you don't think that the extra headroom above noise makes for bett

On Fri, Jan 27, 2023 at 06:51 PM, Mike Miller wrote: Otherwise the insertion loss of the impedance matching filter fixture really chews into your available range on the NanoVNA. With MK's help I was a

Hey guys, I'm sorry that I didn't reply to the post sooner. I wanted to explain better the results in a manner suiting this fine forum. The Transformer T1 was replaced as a shotgun approach and the re

Great. I ordered a 20dB and a 30dB RF amp and found that the 30dB amp was just right. Good luck

Hi Mike, agreed, the reduced measurement range was readily apparent ... and I have a couple of those amps ordered. Thanks, Larry.

Looks like you're making progress Larry. IMO the inclusion of an RF amplifier (I use a low cost 30dB RF amplifier from amazon) is very important. Otherwise the insertion loss of the impedance matching

For quite a few years we've been buying the various Pira RDS generators and a couple of different monitoring devices (P275 FM analyzer in particular) for lots of FM stations. I'm not a dealer or anyth

Thanks gents for all of the great replys. I was hoping that a decent quality alignment software suite existed, perhaps even for android, etc. Heck even a CD with applicable signals, pilots, and marker

NEWAAG, You have given me alot to read. I'll keep watching and asking questions as time goes by. Thanks for your direction. JDM

Hi Bob, it's doing much better, measured values are much less noisy, but I see why people added amplifiers. The impedance reported is a bit low, always around 46.5 ohm so far. I used 51.1 ohm for the

Hi Bob, thanks very much! I figured I had to be missing something fundamental. Larry.

The Murata test circuit assumes an old analog AC rms voltmeter, with 1M input impedance. It is good only for magnitude measurements, not ones including phase. The nanoVNA is 50 ohm in and out, so you

Before I got a stereo generator I was contemplating building this- https://pira.cz/eng/stk2en.htm Since plain generators are easily found, adding this might still make sense. Any opinions on how well

Hi guys, Sorry for the slow response, wall to wall appointments Wednesday and yesterday I ended up chasing rabbits. Hope I can get this sorted today as there won’t be time over the weekend. I had a no

Hey Rick, I don't want to hijack your thread by being somewhat off topic, but how does the SX-770 sound? A Pioneer SX-770 was my very first HiFi purchase in 1971. I gave it away to a friend in 1979 wh

For fun, I just wasted $16. on one of these - I'll test it, and see how it fares. This, with one of those 82 dB step attenuators on ebay may make for a decent cheap FM generator test rig. It appears t

On Fri, Jan 27, 2023 at 09:22 AM, <jdmccor@...> wrote: got a price for Agilent , I think 8122 this morning ; from supplier in Florida. Price $5500 and additional $500 for NIST cal! Huum!?? I wil

B Koski Whole heart agreement on your last statement. But I have been burned with that also. Buyer beware I guess but I do enjoy trying to fix the ones that are suppose to work and don't, enjoy the ch

While the small generator is an interesting item, for setting the dial tracking, why not just use local stations? I use 93.9 and 105.9 in my area, with 88.3 and 106.7 as checks, along with 101.1 in th

I've not had one here, but I suspect Rohde&Schwarz has units (SML?) that are likely on par with the Panasonic. I may get one here for repair and will be able to have more hands-on input (I am not awar