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Recent Posts
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Laney or fender
by joecool85
[December 10, 2024, 07:22:56 PM] -
Op-Amp experiment number one
by joecool85
[December 10, 2024, 07:05:36 PM] -
Nightfire 14 watt build
by joecool85
[December 10, 2024, 06:56:43 PM] -
Help for CARLSBRO GLX 40 Special Red Edition Schematics
by joecool85
[December 10, 2024, 06:54:07 PM] -
I'm learning maybe pay attention to watts
by g1
[December 10, 2024, 04:50:08 PM]
Recent posts
#1
Amplifier Discussion / Re: Laney or fender
Last post by joecool85 - December 10, 2024, 07:22:56 PMThese are both on my short list of amps I would like to try out. From (a lot of) videos I have listened to though, as wells as aesthetics, size, and specs in general, I feel like the Laney LF60-112 is the clear winner. Such a rocking amp!
#2
The Newcomer's Forum / Re: Op-Amp experiment number o...
Last post by joecool85 - December 10, 2024, 07:05:36 PMThey will operate like the datasheet says within their specified voltage range. That said, the higher the voltage input, the higher the voltage swing on the output is possible. If you are looking for clean amplification you also need higher voltage to keep the headroom. IE - if you have 2v into the circuit with a gain of 10x, it will try to output 20v. If you are only supplying it +/- 5v it is going to clip like crazy. Depending on the sound you are going for, maybe that is a good thing, maybe not.
#3
Preamps and Effects / Re: Nightfire 14 watt build
Last post by joecool85 - December 10, 2024, 06:56:43 PMQuote from: Loudthud on November 23, 2024, 12:08:52 PMWhat a poor design. No gain from Q1. Q1 is a switching FET not intended for Audio. High Impedance tone stack more appropriate for a tube amp. Low input impedance inverting opamp stage loads the tone stack too much. Power amp is OK but 100K input is higher than recommended for that chip.
Looks like it was hacked together by some internet hack without a clue.
I agree. This guy has TONS of electronics kits for sale, all of similar quality. https://vakits.com/
#4
Schematics and Layouts / Re: Help for CARLSBRO GLX 40 ...
Last post by joecool85 - December 10, 2024, 06:54:07 PMPlease share some detailed pictures of the inside of the amplifier and we may be able to help you trace the circuit and figure it out.
#5
The Newcomer's Forum / Re: Op-Amp experiment number o...
Last post by saturated - December 10, 2024, 05:45:19 PMI actually have a big boat anchor power supply that has +5, -5, 10 and 49v used in the 90s for my friends wife's families answering service.
At first I was wondering if I could convert the plus and minus 5v to plus and minus 15v but I think that will be too complicated.
So I started looking at supply voltage for these Op-Amps and I am seeing a range....I was wondering if they operate the same over a voltage range. For instance does it matter if it's plus and minus 11v..? When I was trying to decipher the data sheets they did list a max of 20v.
I was gonna duplicate the experiment using plus and minus 5v and see if I got the same results. But when I went to set it up I didn't want to butcher the nice molex harness so I'm gonna have to get some molex connectors .
Regardless I need a convenient source of Vs to do this on a regular basis.
At first I was wondering if I could convert the plus and minus 5v to plus and minus 15v but I think that will be too complicated.
So I started looking at supply voltage for these Op-Amps and I am seeing a range....I was wondering if they operate the same over a voltage range. For instance does it matter if it's plus and minus 11v..? When I was trying to decipher the data sheets they did list a max of 20v.
I was gonna duplicate the experiment using plus and minus 5v and see if I got the same results. But when I went to set it up I didn't want to butcher the nice molex harness so I'm gonna have to get some molex connectors .
Regardless I need a convenient source of Vs to do this on a regular basis.
#6
The Newcomer's Forum / Re: I'm learning maybe pay att...
Last post by g1 - December 10, 2024, 04:50:08 PMThe datasheet for the exact model of fuse will tell you how much over current rating it can go before it blows (and for how long).
#7
Tubes and Hybrids / Re: Fender Deluxe 1996 popping...
Last post by g1 - December 10, 2024, 04:47:18 PMQuote from: Psabin8951 on December 10, 2024, 11:21:21 AMintermittent switch contacts on extension speaker socketI guess this was a Hot Rod or Blues deluxe?
#8
Amplifier Discussion / Re: 2013 Fender Champion 100 p...
Last post by g1 - December 10, 2024, 04:45:41 PMI would guess some cap(s) not up to par in the smps unit.
I only have schematic for Rev.A (attached).
I only have schematic for Rev.A (attached).
#9
Amplifier Discussion / Re: Where to find 6000uF 50V r...
Last post by RG100ESROX - December 10, 2024, 03:31:38 PMQuote from: Miyagi_83 on December 10, 2024, 03:19:24 PMQuote from: RG100ESROX on December 10, 2024, 02:41:28 PM Here ya go!!!Thank you, sir.
I understand that point A is roughly the same as point B, only positive. This means it was simply mislabelled in the bias-string-voltage pic posted earlier. Therefore, I would like to kindly ask you to measure and write down the voltages along the bias string again, but please don't rush it, focus, and note down everything correctly so we don't spend time looking for solutions to non-existent problems.
Looking forward to it.
M.
No. Thank YOU!!
Will do. It'll be later this afternoon , but I'll take my time and get them posted as soon as possible.
#10
Amplifier Discussion / Re: Where to find 6000uF 50V r...
Last post by Miyagi_83 - December 10, 2024, 03:19:24 PMQuote from: RG100ESROX on December 10, 2024, 02:41:28 PM Here ya go!!!Thank you, sir.
I understand that point A is roughly the same as point B, only positive. This means it was simply mislabelled in the bias-string-voltage pic posted earlier. Therefore, I would like to kindly ask you to measure and write down the voltages along the bias string again, but please don't rush it, focus, and note down everything correctly so we don't spend time looking for solutions to non-existent problems.
Looking forward to it.
M.