- heater.jpg (15.1 KiB) Viewed 3474 times
Search found 1702 matches
- 18 Mar 2024, 17:47
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
- 17 Mar 2024, 10:04
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
For how many tubes do you need the heating voltage generation?
- 16 Mar 2024, 09:18
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
In my opinion, this mosfet voltage regulator circuit is not suitable for a small voltage difference between input and output.
- 15 Mar 2024, 14:55
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
The link is to a picture of the step-up regulator.
What is the circuit of the voltage regulator for the heaters?
Please attach a sketch of the schematic.
What is the circuit of the voltage regulator for the heaters?
Please attach a sketch of the schematic.
- 14 Mar 2024, 21:26
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
The picture of the voltage regulator doesn't help much to find out anything.
Do you have more information about it, perhaps the circuit diagram?
What is the input voltage of the regulator?
Does the input voltage remain the same under load or does it drop?
Do you have more information about it, perhaps the circuit diagram?
What is the input voltage of the regulator?
Does the input voltage remain the same under load or does it drop?
- 11 Mar 2024, 20:18
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
Edit: Values corrected
First stage 5E3 using 6N17B:
First stage 5E3 using 6N17B:
- 10 Mar 2024, 11:09
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: 6N17B not working [SOLVED]
- Replies: 13
- Views: 8515
Re: 6N17B not working [SOLVED]
The circuit with the 6N17B tube requires an adjustment of the components for the operating point setting as the values or the characteristic curves are very different to the 12AX7 (7025) tube.
The Fender circuit cannot simply be adopted.
See for example here:
The Fender circuit cannot simply be adopted.
See for example here:
- 20 Feb 2024, 20:00
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Dunlop Cry baby JH-1 low headroom [SOLVED]
- Replies: 8
- Views: 14723
Re: Dunlop Cry baby JH-1 low headroom [SOLVED]
You have replaced both transistors with 2N5088 types. That was wrong, because according to the original circuit diagram, the first transistor is an MPSA13, which is a Darlington transistor. I have made another circuit simulation to see more precisely. The clipping of the sinusoidal signal always occ...
- 20 Feb 2024, 12:54
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Dunlop Cry baby JH-1 low headroom [SOLVED]
- Replies: 8
- Views: 14723
Re: Dunlop Cry baby JH-1 low headroom [SOLVED]
I ran a circuit simulation and found that the shape of the output signal started to round off at about 1.3 Vpeak.
This happens at certain frequencies depending on the potentiometer setting.
Does your guitar have a pickup with a high output level?
This happens at certain frequencies depending on the potentiometer setting.
Does your guitar have a pickup with a high output level?
- 11 Feb 2024, 10:40
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Boss PH1r
- Replies: 4
- Views: 500
Re: Boss PH1r
Connect drain-source from Q6 and see if the phaser signal then comes out.
- 09 Feb 2024, 22:56
- Forum: DIY Projects
- Topic: OGBip-2 overdrive on 2n5088 bipolar transistor
- Replies: 11
- Views: 844
Re: OGBip-2 overdrive on 2n5088 bipolar transistor
Thanks for sharing, I like the sounds.
- 24 Jan 2024, 21:50
- Forum: Vintage Stompbox Corner ( ... - 1975)
- Topic: Ibanez - Overdrive II OD-855
- Replies: 12
- Views: 1629
- 22 Jan 2024, 19:00
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: charge pump voltage divider issues?
- Replies: 5
- Views: 645
Re: charge pump voltage divider issues?
Insert a 7809 voltage regulator with the usual parts around between the plug-in power supply connection and your circuit.
- 18 Jan 2024, 21:34
- Forum: Pedal Debugging & Troubleshooting Support
- Topic: Rat - high pitched squeal
- Replies: 4
- Views: 686
Re: Rat - high pitched squeal
Some op-amps tend to oscillate with a larger capacitive load.
Try the in-loop compensation from this article.
https://www.analog.com/en/analog-dialog ... er-25.html
Try the in-loop compensation from this article.
https://www.analog.com/en/analog-dialog ... er-25.html
- 07 Jan 2024, 11:29
- Forum: Amplifiers
- Topic: Fender H.O.T. practice amp hum (50hz) noise even the guitar is un plugged.
- Replies: 20
- Views: 3111
Re: Fender H.O.T. practice amp hum (50hz) noise even the guitar is un plugged.
Thank you George for your hints, I will try this out on the next amplifier with a hum problem.
- 06 Jan 2024, 21:21
- Forum: PCB Guitar Mania - pedal builders group and debug
- Topic: Maximum Crank no effect sound
- Replies: 9
- Views: 1923
Re: Maximum Crank no effect sound
Is the 3PDT switch soldered in twisted?
- 30 Nov 2023, 16:29
- Forum: DIY Projects
- Topic: Tetrafuzz
- Replies: 7
- Views: 3287
Re: Tetrafuzz
Great development, sounds good to me !
- 23 Nov 2023, 22:17
- Forum: Parts & Tools Sourcing & Trading
- Topic: *best* LDR for Mutron III / Neutron circuit [found/sold]
- Replies: 40
- Views: 33489
Re: *best* LDR for Mutron III / Neutron circuit [found/sold]
I assume that by omitting the first two letters before 1558 in the schematic, Musitronics had the option to install the Omp amps depending on market availability.
There were LM1558, MC1558, CA1558 and perhaps other designators.
There were LM1558, MC1558, CA1558 and perhaps other designators.
- 23 Nov 2023, 09:04
- Forum: Parts & Tools Sourcing & Trading
- Topic: *best* LDR for Mutron III / Neutron circuit [found/sold]
- Replies: 40
- Views: 33489
Re: *best* LDR for Mutron III / Neutron circuit [found/sold]
In the factory schematic, all OP amps are specified as 1558. The Mutron on my bench shows two RC4558BP and one RC4558BN. Since the device works, I leave this in its original state so as not to reduce the value. Yes, in some modifications the lower noise NE5532 are recommended for the signal path to ...
- 20 Nov 2023, 22:43
- Forum: Parts & Tools Sourcing & Trading
- Topic: *best* LDR for Mutron III / Neutron circuit [found/sold]
- Replies: 40
- Views: 33489
Re: *best* LDR for Mutron III / Neutron circuit [found/sold]
I created this Mutron III PCB clone for troubleshooting. I took the component identifiers and the values from the factory circuit diagram. It was an unexpected fault, part of a trace under A5&A5 was oxidized away. Probably battery acid from a leaking battery, there was also a small oxidized area...