Niile: Very impressive ... external PS drive several stages. Wondering how this works ... The PS appears to be able to daisy chain several devices at once. Extra filtering in each seperate stage = it would be nice to see a diagram w/ treatments for this extra filtration ... Also noticing the grounding scheme. I have kept chassis / power line grounds seperated except in the power output stages myself, isolating small signal stages from the power line shields & ground ... to reduce ground loops, etc.
Re: http://kuvablogi.com/nayta/163398/ ... Without an english explaination I'm wondering what this 'scope trace is about?? Looks like 60 Htz. modulated with 1K Htz on the speaker output ?? What is it ??
Nice ideas, nice execution ...
Re: http://kuvablogi.com/nayta/163398/ ... Without an english explaination I'm wondering what this 'scope trace is about?? Looks like 60 Htz. modulated with 1K Htz on the speaker output ?? What is it ??
Nice ideas, nice execution ...
Thankie😉
What do you mean with driving several stages? And daisy chain?!? 😀 The PS only contains BrianGT's basic PS board and trafo.
About the grounding issues, i agree it would be a good idea. I need to work on it.
Its an old picture of my school works (lm4780) output. It oscillated quite badly but later on i discovered i had too small gain resistor. Now it works fine.
What do you mean with driving several stages? And daisy chain?!? 😀 The PS only contains BrianGT's basic PS board and trafo.
About the grounding issues, i agree it would be a good idea. I need to work on it.
Its an old picture of my school works (lm4780) output. It oscillated quite badly but later on i discovered i had too small gain resistor. Now it works fine.
" ... the grounding issues, i agree it would be a good idea. I need to work on it. ..."
Also you might consider some kind of "push and twist" or BNC type connector for the power supply = more reliable, etc.
Also you might consider some kind of "push and twist" or BNC type connector for the power supply = more reliable, etc.
A one-sunday project: super kitchen radio
I made a unique, I hope, radio for kitchen application using following steps:
- bought an old YAMAHA hifi tuner from ebay for 15 EURO
- built in a toroidal transformer and a small LM4755 self made board
- mounted volume control switch & speaker connectors
I got an unexpectedly good sound with my Magnat Sound Force 1200 speakers! Powered by a single-ended 20 V stabilized power supply, this can be really loud for a radio - can be used for parties, too! This small IC is perfect for applications like this - where low power & simplicity are needed.
Cheers!
I made a unique, I hope, radio for kitchen application using following steps:
- bought an old YAMAHA hifi tuner from ebay for 15 EURO
- built in a toroidal transformer and a small LM4755 self made board
- mounted volume control switch & speaker connectors
I got an unexpectedly good sound with my Magnat Sound Force 1200 speakers! Powered by a single-ended 20 V stabilized power supply, this can be really loud for a radio - can be used for parties, too! This small IC is perfect for applications like this - where low power & simplicity are needed.
Cheers!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Looks like you invented the receiver!🙂
BUT a very good sounding one as you mention.
Another good point you make is that the amps can fit into existing components- how about a cd player with amp? I remember opening a CD player once that was half empty inside...
BUT a very good sounding one as you mention.
Another good point you make is that the amps can fit into existing components- how about a cd player with amp? I remember opening a CD player once that was half empty inside...
Yes, it became a simple receiver 😉
Two speakers mounted on both sides of the case are still missing - then we get a non-portable boom blaster 🙂
The Philips CD723 is a good candidate for mounting an amp inside 🙂
Two speakers mounted on both sides of the case are still missing - then we get a non-portable boom blaster 🙂
The Philips CD723 is a good candidate for mounting an amp inside 🙂
Member
Joined 2002
BWRX said:
That is exactly what i thought they were to. They looked like ofna's or kyosho's.
J'
My LM4780 kit from audiosector. More pictures to come as soon as i find my camera.
Must say that the sound is great. Unfortunately I got "Humming" when I connect both rca-connectors.
Must say that the sound is great. Unfortunately I got "Humming" when I connect both rca-connectors.
An externally hosted image should be here but it was not working when we last tested it.
Here's mine. Looks better than it sounds (for now I hope)
An externally hosted image should be here but it was not working when we last tested it.
zdr: Yes it looks very nice.
(Do you know how to improve on the sound?? ... waiting for parts?? = just curious.)
(Do you know how to improve on the sound?? ... waiting for parts?? = just curious.)
No noise at all, started working from first press on the button. I am not impressed by the sound, compared to my Vincent SV-236 which can be found second hand for less than 800 eur.
Listen to the man ( Peter Daniel ) and remove most of your filter caps.
You will be surprised, also find an easier load for the GC before you write it off. You did such great work on the casing, to bad if it doesent find its potential.
I would also swap to a simple, filterless IEC.
You will be surprised, also find an easier load for the GC before you write it off. You did such great work on the casing, to bad if it doesent find its potential.
I would also swap to a simple, filterless IEC.
