Search found 46 matches
- Sun Feb 27, 2022 5:46 am
- Forum: Technical Discussion
- Topic: Spectrum/THD using FFT on Siglent scope
- Replies: 14
- Views: 1694
Re: Spectrum/THD using FFT on Siglent scope
The first plot sort of indicates a 90dB max signal to noise floor capability? Can the x and y axis be set up for typical division sizes, or do you have to rely on cursor settings? Can harmonic levels also be displayed in % of fundamental? Have they updated firmware/capabilities over the years? With...
- Sat Feb 26, 2022 5:25 am
- Forum: Technical Discussion
- Topic: Spectrum/THD using FFT on Siglent scope
- Replies: 14
- Views: 1694
Re: Spectrum/THD using FFT on Siglent scope
The first image is a screen capture direct to a usb stick which you can plug into the front of the scope. The second, which doesnt look as nice was taken with a handheld camera. Note that Keysight has different versions of this scope. Make sure you get the one with the internal function generator ot...
- Fri Feb 25, 2022 5:49 pm
- Forum: Technical Discussion
- Topic: Spectrum/THD using FFT on Siglent scope
- Replies: 14
- Views: 1694
Re: Spectrum/THD using FFT on Siglent scope
A few years ago I researched all of the lower cost scopes. I settled on a Keysight DSOX1102G as it seems to produce acceptable FFT plots while staying within my budget. It has a built in function generator, and also generates Bode frequency/phase plots. Perfect for quickly testing audio devices. Unf...
- Sat Sep 11, 2021 11:06 pm
- Forum: Technical Discussion
- Topic: Garage Sale Find: 44 Vintage Tubes
- Replies: 4
- Views: 565
Re: Garage Sale Find: 44 Vintage Tubes
The 6L6WGBs are North American made and they are more commonly known as 5881s. They are almost identical to the ones made by Tung-Sol, and they are excellent rugged tubes. I have a bunch of these that I pulled out of an old Canadian military flight simulator, circa 1950s and they look the same as yo...
- Sat Apr 18, 2015 10:22 pm
- Forum: Technical Discussion
- Topic: Hammond AO-35 due tomorrow!
- Replies: 22
- Views: 2833
Re: Hammond AO-35 due tomorrow!
Wow, that was a lightning fast reply. Thanks for the info. I'm not going to use the PPIMV initially, but the rest of my layout will look similar to yours. I am going to put the fuse up front though. As well, I will rewire the ground circuitry with two star ground points.
Chappy
Chappy
- Sat Apr 18, 2015 10:03 pm
- Forum: Technical Discussion
- Topic: Hammond AO-35 due tomorrow!
- Replies: 22
- Views: 2833
Re: Hammond AO-35 due tomorrow!
I just picked up one of these chassis. It hums a lot so I think it is going to need an electrolytic recap job first. I'm going to do the Ghia conversion. Premiumplus, M Fowler, You guys did a nice job converting your amps. Before I start drilling holes, did you guys get any hum issues with mounting ...
- Sun Jan 20, 2013 6:17 pm
- Forum: Technical Discussion
- Topic: Uncovered Guitar Effects & PA System Components ~ Need H
- Replies: 13
- Views: 3044
Re: Uncovered Guitar Effects & PA System Components ~ Need H
Some of those pedals you have might be worth checking into. You could almost buy yourself a small amp kit with the money you'd get from the DM-2 alone. Chappy Good to know. They are worth checking on. A DM-2 sold for over $400 and mine is mint. Wonder why the older effects are worth so much? Everyb...
- Sun Jan 20, 2013 1:47 am
- Forum: Technical Discussion
- Topic: Uncovered Guitar Effects & PA System Components ~ Need H
- Replies: 13
- Views: 3044
Re: Uncovered Guitar Effects & PA System Components ~ Need H
Some of those pedals you have might be worth checking into. You could almost buy yourself a small amp kit with the money you'd get from the DM-2 alone.
Chappy
Chappy
- Sat Jan 19, 2013 12:26 am
- Forum: Technical Discussion
- Topic: Plate wiggler
- Replies: 9
- Views: 1414
Re: Plate wiggler
How about a photoresistor (light dependent resistor) controlled by a low frequency oscillator driving a light bulb. IIRC the Univibe guitar effect pedal (Jimi Hendrix, Robin Trower) used these in the phasing part of the circuit. Seems like the one in the link below has a high enough voltage rating t...
- Thu Jan 10, 2013 8:28 pm
- Forum: Dumble Discussion
- Topic: About Moss of Brown Note
- Replies: 57
- Views: 12304
Re: About Moss of Brown Note
It's too bad he is having issues. I really liked his site when I first saw it 4 or 5 years ago. It looked like he had a real good thing going. IIRC he was quite active in the 18Watt community and had a good following there at the time.
Chappy
Chappy
- Thu Jan 10, 2013 7:01 pm
- Forum: Dumble Discussion
- Topic: About Moss of Brown Note
- Replies: 57
- Views: 12304
Re: About Moss of Brown Note
Has anyone heard from Moss??? Thank you for reviving this thread. I am seriously thinking about an ODS build right now and I was going to buy a kit from Brownote to save me the hassle of scrounging up all of the parts. You just saved me a bunch of cash and/or heartache. Beer is on me if we ever cro...
- Fri Jan 04, 2013 3:01 pm
- Forum: Technical Discussion
- Topic: Merlin's Pre-amp book in 2nd edition is out now
- Replies: 85
- Views: 11181
Re: Merlin's Pre-amp book in 2nd edition is out now
Even at full price this book is a steal! Im ordering the ebook on designing power supplies as well Martin. The discount code applies too. Good deal on both books. All together it came to just under $44 bucks. I was actually ready to pay full price tonight but ran into the discount code on this thre...
- Fri Jan 04, 2013 12:47 am
- Forum: Technical Discussion
- Topic: Merlin's Pre-amp book in 2nd edition is out now
- Replies: 85
- Views: 11181
Re: Merlin's Pre-amp book in 2nd edition is out now
Mine showed up today. Much easier on the brain than my series of books from Richard Kuehnel.
Chappy
Chappy
- Wed Dec 26, 2012 1:26 am
- Forum: Technical Discussion
- Topic: Merlin's Pre-amp book in 2nd edition is out now
- Replies: 85
- Views: 11181
Re: Merlin's Pre-amp book in 2nd edition is out now
Code still works. I pulled the trigger too! Late Xmas present.
Chappy
Chappy
- Sun Jun 26, 2011 4:31 pm
- Forum: Garage Talk
- Topic: Garage sale
- Replies: 24
- Views: 6542
Re: Yea
Yea,Kinda stinks,They look real cool!Tom,Mark was saying I might be able to put the Power Tranny in something.It would be nice to be able to use it in a rocket or 18 watt. RCA 105771 Pim:117 v. 60 cy. Plate 292-0-292 V. 72 Ma Fil #1= 5 v. 2 amp Fil #2 = 6.35 2.75 amp What do you think? Mikey Sounds...