I repair some Ultrasonic cleaners for the Jewellery trade. /lead up /Internal Description These have a 220VAC mains input, bridge rec, 2 BUX 80s and a fairly...
Declan Moriarty
junk_mail@...
Sep 7, 2005 3:21 pm
6931
I'm not sure I understand your question but I think the answer to your question is option #1. That's because the circuit needs a low source (power supply)...
Fred Townsend
fred@...
Sep 7, 2005 4:45 pm
6932
Recently, Somebody Somewhere wrote these words ... I put in Manufacturer replacement (Aluminium) BUX 80s before testing. My take on the thing is this: The...
Declan Moriarty
junk_mail@...
Sep 7, 2005 5:14 pm
6933
... red herring? You mean the transistors were not defective? ... I'm having a lot trouble understanding what you are saying. Let me state my belief. The...
Fred Townsend
fred@...
Sep 7, 2005 6:33 pm
6934
Hi Declan, actually the line filters in switch-mode power supplies are meant to keep the noise inside the power supply rather than keeping something out. So...
Uwe Zimmermann
uwe.zimmermann@...
Sep 7, 2005 6:34 pm
6935
... You might be able to minimize the spikes by putting an RC damping network (snubber) across the primary of the transformer (between the collectors of the...
Dave Baldwin
dibsed@...
Sep 7, 2005 7:34 pm
6936
... You might be able to minimize the spikes by putting an RC damping network (snubber) across the primary of the transformer (between the collectors of the...
Dave Baldwin
dibsed@...
Sep 7, 2005 7:35 pm
6937
... You might be able to minimize the spikes by putting an RC damping network (snubber) across the primary of the transformer (between the collectors of the...
Dave Baldwin
dibsed@...
Sep 7, 2005 7:39 pm
6938
... You might be able to minimize the spikes by putting an RC damping network (snubber) across the primary of the transformer (between the collectors of the...
Dave Baldwin
dibsed@...
Sep 7, 2005 7:40 pm
6939
... You might be able to minimize the spikes by putting an RC damping network (snubber) across the primary of the transformer (between the collectors of the...
Dave Baldwin
dibsed@...
Sep 7, 2005 8:34 pm
6940
Recently, Somebody Somewhere wrote these words ... I checked the gains. The Manufacturer's transistors died (my fault), and I now have the replacements in...
Declan Moriarty
junk_mail@...
Sep 8, 2005 9:55 am
6941
Wasn't it Winston that said we are two countries separated by a common language? hFE is NOT = to hfe. Gain bandwidth product (Ft) (specified in MHz) is only...
Fred Townsend
fred@...
Sep 8, 2005 5:00 pm
6942
... Sorry for that, My ISP was having email problems. I think I tried to send it a couple of times but never got an acknowledgement from the server to finish...
Dave Baldwin
dibsed@...
Sep 8, 2005 5:04 pm
6943
Recently, Somebody Somewhere wrote these words ... Ah! That feels more like it. Somebody disagreeing with me. That's when learning starts. No manufacturer...
Declan Moriarty
junk_mail@...
Sep 9, 2005 9:14 am
6944
Well, I did the tests and am reporting back. We can argue about it later 1. BU225s were worse than BUX80s (i.e. more noise) 2. They wiped out the medium wave...
Declan Moriarty
junk_mail@...
Sep 9, 2005 10:10 am
6945
... limited effect of the BUX80s which notched out local stations and then just annoyed on the rest of the waveband You probably just moved the problem instead...
Pieter Hoeben
info@...
Sep 9, 2005 11:54 am
6946
Hi Declan! ... This might be on purpose! We have some ultrasonic baths at our institute and from all of them you at least hear an audible 50Hz (or better...
Uwe Zimmermann
uwe.zimmermann@...
Sep 9, 2005 11:57 am
6947
... NEVER EVER think like this, some designers (with the economist holding them a gun at the head) will save the last percent of a cent if possible. Just had...
Jan Wuesten
fjz@...
Sep 9, 2005 12:22 pm
6948
Recently, Somebody Somewhere wrote these words ... Yes, it was :-( The Half/Full power switch has a diode there to rectify the AC _before_ it goes to the...
Declan Moriarty
junk_mail@...
Sep 9, 2005 12:44 pm
6949
Hi Declan, That this kind of device did not have a mains filter is not extraordinaly. My cleaner has neither. So the ultra sonic wave is modulated by the 100...
H.C. Croon
h.c.croon@...
Sep 9, 2005 9:00 pm
6950
A line filter as the one depicted in my ASCII graphics will in no way take away or otherwise influence the 100Hz line cycles! It will only prevent...
Uwe Zimmermann
uwe.zimmermann@...
Sep 10, 2005 5:40 am
6951
Recently, Somebody Somewhere wrote these words ... That capacitor would remove the effect of the half/full power switch -- With best Regards, Declan Moriarty. ...
Declan Moriarty
junk_mail@...
Sep 10, 2005 9:10 am
6952
My last 'smart' move in this area was to but a Picstart plus for pics, only to have Microchip gut the design and now there's a new circuit board needed :-(. ...
Declan Moriarty
junk_mail@...
Sep 12, 2005 3:27 pm
6953
Hi Declan, this appears to be a quite simple chip to program. No, I don't have any experience with it and the following is only the result of my ...
Uwe Zimmermann
uwe.zimmermann@...
Sep 12, 2005 4:06 pm
6954
Try http://www.aec.com.tw/ Fred Townsend ... -- Author: Fred Townsend INET: fred@... Fat City Hosting, San Diego, California --...
Fred Townsend
fred@...
Sep 12, 2005 5:00 pm
6955
Recently, Somebody Somewhere wrote these words ... Yeah, I noticed that. It's a bit Irish, isn't it? Where is .th anyhow? Thailand?? lancos.com seems to be on...
Declan Moriarty
junk_mail@...
Sep 12, 2005 5:22 pm
6956
Recently, Somebody Somewhere wrote these words ... Fred, you must be a man of many talents :-)). Any browser I point at that site bales out. One is kind enough...
Declan Moriarty
junk_mail@...
Sep 12, 2005 6:20 pm
6957
It says: (BTW I didn't have any trouble bring up the site with IE7 or Netscape.) products_title.gif (2360 bytes) Products ...
Fred Townsend
fred@...
Sep 12, 2005 7:33 pm
6958
... That is the Advantec website, a common supplier of lab equipments here. Try the following links, if you have problem accessing their home page. Products...
Yeasir Rahul
rahul@...
Sep 12, 2005 7:37 pm
6959
... Firefox does a good job. Seemes to be some problem at your side... ... That one is good for prototypes but not qualified for production (programming done...
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