has anybody got the Maplin geiger counter or the little ZP GM tube they dont want ?
I am interested in doing some experiments.
thanks
Barry Wilkins
I am interested in doing some experiments.
thanks
Barry Wilkins
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Hi everyone!
I managed to get my hands on a rough condition B&K 707 for "the best price" because it was not working. It's my first tube tester and I'm really wanting to get it up and running. I downloaded that manual that has the schematics and tested every resistor and capacitor and replaced the ones that failed. I replaced the missing 83 rectifier tube with a used but tested-good one. I also have a number 80 rectifier tube that I have used in tests before I found the 83 tube.
Initially I noticed that I was not getting the red on-light to turn on, but it... -
Recently I acquired an Eico HFT 92 AM/FM radio made back in 1958. The unit has had some decent modifications done such as replacing the rectifier tube with silicon diodes and replacing the main filter capacitor with electrolytic capacitors. When I powered it up FM wouldn't tune past 105Mhz. I checked the FM tuner front end assembly and found a capacitor not soldered to the coil from the Plate B+ to and ground on the other side of the coil. Some calibration was needed on the trimmer capacitor on the tuner. My question is AM is extremely weak. When I tap on the tube I get all kinds of snapping and... -
Hi there,
Recently I bought broken Bowers & Wilkins PX7 S2, the problem with them is that battery discharges on its own even with headphones turned off. It is a quite common issue with this model and even with model higher PX8.
With help of thermal camera I found out that there is one IC that is hot even with headphones turned off. To check if I'm correct I bought another PX7 S2 working one and replaced small charging board with this IC and problem solved, battery no more drains on its own. After changing board back to original problem returned so I'm 100% sure problem...05-30-2025, 01:11 PM -
The Fatman iTube (OEM Dared, which also sold its own-branded version, the Dared MP-5) is a tube-buffered gainclone first introduced c.2005, to target the iPod market with a bookshelf tube setup. It became a huge success over the next ~15 years, selling over ~100k units worldwide to a market where it was often their first introduction to vacuum-tube audio on a budget.
http://www.enjoythemusic.com/magazin.../dared_mp5.htm
One of the Fatman versions landed up for auditioning a few days ago, and I must say that I was impressed with its form-factor, pricing,...03-13-2021, 08:45 PM -
Hello everyone, I just got my hands on a Sharp lc 80le632u TV that initially had the 1 short, 1 long blink sequence. That indicates a lamp error, however if I follow the isntructions to reset the error counter, the TV starts correctly: no missing LEDs everything lods just fine.
I went through the process to get to the diagnostic screen, and got this ( attached).
Since all LEDs are working correctly, and the TV seems to load fine after reset, that tells me that the power board and the LED strips are working correctly. Could this be a main board issue?
Any...