Shorting out the multiplier gives us a meter with about 200mV FSD, perfect. The meters are dated 1972.
Doz' Blog
Electronics and things...
Sunday, 21 March 2021
The ESP32 Analog (Analogue!) Clock
Shorting out the multiplier gives us a meter with about 200mV FSD, perfect. The meters are dated 1972.
Thursday, 25 February 2021
Moving on up from ATMEGA328 & Arduino. The ESP32 "Mexican wave" light chaser.
Tuesday, 26 January 2021
What is this?? The Amazon 2TB External SSD.
An SSD was required for a Raspberry Pi project. One was ordered from Amazon, 2TB. It was stupid cheap.
We may be here some time...
As it turns out, we didn't have to wait as log as we thought...
It had fallen over after 320 GB...
Saturday, 23 January 2021
Arduino Audio Compressor.
Thursday, 21 January 2021
Linn Keltik repairs
It was also fitted with the Keltik Bass extension module. This is simply a low pass filter to allow the amplifier to drive a woofer as part of an active cross-over system.
Saturday, 16 January 2021
Linn Lingo repair - won't change speed.
"Got a Lingo here, it's been serviced by someone here, but it's now stuck in 33 RPM. Care to take a look?"
Yeah - why not?
It's the first version of the lingo.
Off with the lid, and I can see some work's already been done. It's been recapped. The workmanship is good... or is it?
The original repairer was obviously proud of his work, as there's a signed sticker inside the unit. I've blurred this out to prevent embarrassment.
Now the lingo is similar to other power supplies of this era from linn, they suffer with capacitor failure. Now you could upgrade your supply to the latest and greatest (don't forget kids, Linn ownership is all about upgrades, right?), or get it repaired. This has all new capacitors, of quality brand, so it should be good. It was only done in August last year (it's now January). Apparently 45 RPM hasn't worked since they had it back...
One is duff... double damn... was it a duff one out of the packet? I replace it, and promptly blow another. Triple damn. What's going on?
Saturday, 2 January 2021
Heathkit Stereo control unit USC-1
I chose not to re-stuff the can on this occasion, as there's a nice bit of tag strip that forms the power supply filter, so they could just be mounted there ...
Wednesday, 30 December 2020
Heathkit MA-12 Hifi amplifier restoration.
Neil called ...
Obvious faults... it's full of Hunts capacitors (evict on sight) , and the electrolytics are, well.. past it.
Now to do the other three! ....