I'm with you on comments. I post my videos like I want too and if they're liked okay and if not okay too. I ignore any off comments. I like your channel and you go about things like I do. Keep em coming.
Trouble shooting is often moving from confusion to confusion until you stumble on something interesting. This is a good example. Of course you have completed the series, so suggestions are not really applicable - but the only thing I would suggest, (perhaps for others), is that time domain investigation with a scope may offer insight that frequency domain, (spectrum analyzer) , does not. For instance I would not be surprised to see a square-ish wave output instead of sine. When the problem is found it will be like the cat in the box, the wave function will collapse and it will all become obvious. ;-}
You could try linking 0.47uf capacitors across the suspect ones to see if your full sweep range comes back. Love the quality of the construction but makes it really difficult to trace faults.
If a YT'er makes a video about something I'm not interested in, I won't watch that video. I would'nt dream of leaving a comment saying 'I don't want to watch this.', because there are other people who will want to see it.
Not actually polarized I believe that band is denoting outside foil on those caps. Also, it would be handy if you could setup a test with the module on the bench and use an active probe on your spectrum analyzer to see where the bucks being dropped.
The symbol on the schematic definitely shows them as polarised, though, both with the + and - symbols and the curved bar indicating the negative. But why on earth would you use a polarised cap for 470 nF?
I haven't seen how this ends yet but I was thinking that the signal suddenly turns on in the middle of the sweep range almost like a diode junction turning on. Hmmm?
I’m wondering if the amp was being overdriven when you tested it, which is why it looked so bad and wasn’t amplified, you may have reached saturation of the amp.
What does it look like on the o'scope? The size of the fundamental suggests to me that it might be saturating an amplifier. Caps measuring too big usually means leakage.
I'm with you on comments. I post my videos like I want too and if they're liked okay and if not okay too. I ignore any off comments. I like your channel and you go about things like I do. Keep em coming.
Thanks
Trouble shooting is often moving from confusion to confusion until you stumble on something interesting. This is a good example. Of course you have completed the series, so suggestions are not really applicable - but the only thing I would suggest, (perhaps for others), is that time domain investigation with a scope may offer insight that frequency domain, (spectrum analyzer) , does not. For instance I would not be surprised to see a square-ish wave output instead of sine. When the problem is found it will be like the cat in the box, the wave function will collapse and it will all become obvious. ;-}
You could try linking 0.47uf capacitors across the suspect ones to see if your full sweep range comes back. Love the quality of the construction but makes it really difficult to trace faults.
SMB is the push fit version of connector, I think those are either SMA or SMC.
SMC
Just worked on a 2001A with the same modules and those are definitely SMC connectors.
If a YT'er makes a video about something I'm not interested in, I won't watch that video. I would'nt dream of leaving a comment saying 'I don't want to watch this.', because there are other people who will want to see it.
Not actually polarized I believe that band is denoting outside foil on those caps. Also, it would be handy if you could setup a test with the module on the bench and use an active probe on your spectrum analyzer to see where the bucks being dropped.
The symbol on the schematic definitely shows them as polarised, though, both with the + and - symbols and the curved bar indicating the negative. But why on earth would you use a polarised cap for 470 nF?
Is the sound at the end of your intro you moving around on your creaky stool?? 😆
I haven't seen how this ends yet but I was thinking that the signal suddenly turns on in the middle of the sweep range almost like a diode junction turning on. Hmmm?
Watching these in the correct sequence is better than an Agatha Christie! Who knows who is guilty? Learning a lot here, thanks.
I’m wondering if the amp was being overdriven when you tested it, which is why it looked so bad and wasn’t amplified, you may have reached saturation of the amp.
What does it look like on the o'scope? The size of the fundamental suggests to me that it might be saturating an amplifier. Caps measuring too big usually means leakage.
Are you using an attenuator? That signal going to the sa look a bit too much....
I think it put out 0dbm. Anyway my SA is pretty tough. Good to +30dbm
@@IMSAIGuy I am always worried about sa mixers. I don't know why but I am really scared. To be honest many years ago I had a bad experience 🤣
you are right to be paranoid around analyzers
PIN diodes also require a certain amount of power to operate correctly.
Start checking alll electrolytic caps. The manufacturer sourced from one supplier. Where you found a few bad ones, there are likely others!
how about CR6 and CR7 as that symbol is for a varicap diode
_99.9% of you guys are great_
...
Oh sure... single me out.
:D
Cheers,
I thought you looked like a trouble maker 🤣
Is the silver tubular 10uF cap ok?
of course not
@@IMSAIGuy Heh heh...surprise, surprise! ;-)
@@PapasDino spoiler alert: they where the driest capacitors I've ever seen.
Nice
SMA
they are SMC actually
@@IMSAIGuy - OK! Don't know those.