The workmanship Paul does is amazing,
The Amp runs 18W Class A the A/B upto 60W/ch 8R
From right to left:- Power Isolation Switch, Push for instant start and timed out about 1Hr with no music playing, Toggle Switch centre trigger-Up OFF - Down away ON
Switch Toggle on back is for Balance or...
See Pinkfish for coments.
EWA LS80 speaker cables
Elsdon Wonfor Audio LS-40 speaker cables
Elsdon Wonfor Audio LS-25 speaker cables
Next question are you all well ??, just had my jab here, But the cold has made my bones hurt.
The M50A is biased to 35W Class sliding to A/B.
The heatsink is the chassis and temperature controlled not to go above 40C (unless you are already at 40C), So in a home at 25C the max temp was 37.8C
On start up the idle current is set to be twice the running current so the M50A quickly get to it...
Just a note,
First question how does the PSU deliver current to the load ? is it 50/100Hz (60 120Hz) or can the load demand in short bursts?
If it is short burst and at highish speed lets say 100uS at 20V RMS into 4Ohms how does the bridge rectifier and the mains top it up? Does the 50Hz take 10...
Is everybody in good health?
It has been shit here in Lock down and in London, all my hospital visit have been cancelled and I miss my nurse Maxine and her coffee.
Well today St Barts hospital near St Paul.s in the centre of London have asked me to come in, I am worried I hate trains...
Well now forced to stay indoors and my pit I can do some R&D work so first project is a volume control using optics.
It will allow us to have any value and multi channel pots at any pre-fixed value i.e. 10R-1000MR and either Log/Anti Log or Linear well any curve you want basically.
Today at 10.00AM my poor friend and great Hi-Fi critic died after a long illness.
My deepest sympathy go out to his wife and children.
Malcolm was involved in a car crash a few year ago which left him bed bound.
Malcolm gave me as Inca Tech and Dreadnought and Magnum and TQ some great and...
This is based on the Maplin/Hitachi theme these board are stereo and use much better and rugged FETS.
The PCB is stereo and you build it,
It gives 100W RMS into 8R
Each PCB blank will cost £40 it is double sided 2oZ Cu with silk screen.
A modified theme. For the Hitachi/Maplin power amp | SECA
XLR listening test into ATC 40 actives
A question on Wigwam about TQ cables.
1) Firstly TQ cable is not made with ferro material in the plastic , as this would grind down the tooling a would cost TQ to much money, and also I have done the experiment it would be the wrong magnetic material (to...
This project for DIYer is based on the Q20 circuit but it can give you power level greater than 50W.
The top PCB is the Power Amp you get 2 off these the bottom PCB is the split psu board for the power amps, the 2 circuit boards are toys for the kid and are a FM TX low power device. Again it...
No More Semelab Audio FET's
Sorry Claymore fans, the upgraded Semelab Audio FET,s I used the replace and upgrade Inca Tech Claymore have stopped production.
I have enough to complete the upgrade of the two Claymore's that I am doing now ONLY.
The hopeful news is I think I have found another...
At the Bristol Show I met Gareth James of OPHIDIAN. The speakers he designed looked very attractive and the musical sound emanating from them was very good, This delightful pleasant young man should go far given the breaks he will need in this business. Good luck Gareth.
Thank you Glenn for allowing us to use your lovely write up on the Q20.
That was a most unexpected phone call Saturday afternoon but a very pleasant one and it was great chatting with you .
So as promised I thought I would drop you a line and let you know my first impressions of the...