Search found 1582 matches

by laurie
Fri May 24, 2024 12:13 pm
Forum: Pedals - All Brands
Topic: Isolated power supply
Replies: 7
Views: 2610

Re: Isolated power supply

CP205 upgraded1.jpg
CP205 upgraded1.jpg (194.77 KiB) Viewed 126 times
.
.
CP205 upgraded2.jpg
CP205 upgraded2.jpg (94.43 KiB) Viewed 126 times
by laurie
Fri May 24, 2024 3:44 am
Forum: Pedals - All Brands
Topic: Isolated power supply
Replies: 7
Views: 2610

Re: Isolated power supply

I've solved the overheating problem permanently.

I de-soldered the 7809 regulators, ran 2 inch wires from the PCB to the regulator, and bolted the regulators to the power supply lid. The lid is 1.2mm Aluminium so is an adequate heatsink.

So far, so good.
by laurie
Sat May 18, 2024 1:21 pm
Forum: Amps
Topic: New Toys
Replies: 10
Views: 413

Re: New Toys

They are very nice amps.
by laurie
Fri May 17, 2024 4:59 pm
Forum: Pedals - All Brands
Topic: New Non-BOSS Pedals
Replies: 287
Views: 154486

Re: New Non-BOSS Pedals

Nice! Thanks for the update.
by laurie
Fri May 17, 2024 4:57 pm
Forum: General
Topic: Synthesizer
Replies: 80
Views: 63029

Re: Synthesizer

Today I finally finished the repair of my friend's Roland JX-3P (needed a new power cord and a new backup battery, as well as intensive cleaning) and the KORG Poly-800 (backup memory modification, corroded battery spring replaced plus lots of cleaning and filter calibration). Both units are working...
by laurie
Wed May 15, 2024 3:30 pm
Forum: Amps
Topic: New amp day! Mesa Heartbreaker.
Replies: 21
Views: 12086

Re: New amp day! Mesa Heartbreaker.

Zerksies wrote:
Wed May 15, 2024 2:53 pm
Are the preamps tubes under that silver plate? I'm only seeing one but the schematic is showing five
Yep.
by laurie
Wed May 15, 2024 12:27 pm
Forum: Pedals - All Brands
Topic: Isolated power supply
Replies: 7
Views: 2610

Re: Isolated power supply

Bottom line - at 300mA the 7809 regulator is dissipating 1.5W which is enough to cause a temperature rise that pushes the 7809 into thermal shut-down. With high draw pedals (e.g. my Strymons) I am experiencing random drop-outs due to over-temperature cut-out of the regulators. Running pedals with m...
by laurie
Fri May 10, 2024 12:20 pm
Forum: Pedals - All Brands
Topic: Isolated power supply
Replies: 7
Views: 2610

Re: Isolated power supply

CP205-2.jpg
CP205-2.jpg (236.34 KiB) Viewed 840 times
.
.
CP205-1.jpg
CP205-1.jpg (371.93 KiB) Viewed 840 times
by laurie
Fri May 10, 2024 12:13 pm
Forum: Pedals - All Brands
Topic: Isolated power supply
Replies: 7
Views: 2610

Re: Isolated power supply

UPDATE - Caline CP205 power supply After using a couple of these power supplies for a few months and dismantling one to see what is inside, I can report the following. The 8 outputs are most assuredly isolated. There is no ground connection between them, or back to the power pack. Each output is su...
by laurie
Sat May 04, 2024 11:32 am
Forum: Amps
Topic: New amp day! Mesa Heartbreaker.
Replies: 21
Views: 12086

Re: New amp day! Mesa Heartbreaker.

I finally decided to sell the Heartbreaker, so ran a bunch of tests on it to make sure everything weas working properly. It has always sounded good, but maybe a bit "thin" in places. Two of the toggle switches were malfunctioning, plus one of the input tubes was weak. Fixed all that and it is HUGE W...