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Hi OB_1,
See this offer and write him to ask validity: **broken link removed**
IF you wish to use such diode at frequencies under say 100 MHz then I suggest using the so called Lambda diode because you can actually assemble a Lambda diode you yourself from two JFETs (from a P and an N...
Hi,
It can only be an operational amplifier so the CD4556 is out of question.
See this possible datasheet for NJM 4556
https://www.digchip.com/datasheets/parts/datasheet/330/NJM4556A-pdf.php
You can use any low noise op amp in the same circuit instead if the NJM is not available for you
unkarc
Hello Ravi,
you can see AM modulation principle for your shown circuit from here:
http://www.classeradio.com/review.htm
You may wish to build an audio amplifier with some hundred milliWatt output (an old AM pocket radio that has a audio output transformer with its push-pull amplifier is good...
Hi,
You may try these links and if you are unsuccessful, perhaps you write the exact type what you wish to replace?
unkarc
http://electronicrepairguide.com/transistor-cross-reference.html
**broken link removed**
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search
tektronix 465 service manual
Hello jb1955,
Sorry but I do not know of any other link from where you could freely download the multimeter option.
The link I gave includes two manuals with the DM44 included, the 466/464 and the 475A with DM44. These scope families were very similar so the...
tektronix 465b
hello jb1955 and Tweeks,
you both may find this link useful: **broken link removed**
scroll down to about the middle of the long page, be patient ftp site is slow.
unkarc
flourescent ballast kip hansen
Hi,
Unfortunately the marking on your transistor is unknown to me.
Assuming it is a bipolar transistor (and not a power MOSFET) you may simply substitute it with a hefty bipolar transistor for a test try.
You may be able to obtain this transistor from digi-keys...
xtal change frequency
Yes. Xtal oscillators whose frequency can be controlled by voltage are called VCXOs (voltage controlled Xtal oscillators).
Usually varicap diodes are used for this purpose. See some link on this topic:
**broken link removed**
**broken link removed**
**broken link...
Re: White LED Questions
Hi,
Maybe this link is good for you: **broken link removed**
and some simple circuits to drive them when you have 1.2-1.5V DC source only (well below the needed 3.1-3.3V forward voltage):
http://www.cappels.org/dproj/ledpage/leddrv.htm
rgds, unkarc
magic loop ant
Hi,
Usually EM antenna softwares are used for such designs like Sonnet or Ensemble from Ansoft etc because you can easily test some "what if" questions when you change some parameters.
If you prefer calculation, here are some notes, starting with probably the best:
**broken...
loop antennas pdf
Hi,
You have to specify whether the loop antenna's circumference (of one turn) is around one wavelength or much smaller than one wavelength?
In case the circumference is around one wavelength, the one turn resonant loop (either a square with quarter wave sides or a full...
Hello,
If I chime in with these links, they may be of some further help for you?
**broken link removed**
This software designs bandpass filters with helical elements and also a free program, maybe also useful:
http://tonnesoftware.com/helical.html
rgds, unkarc
PS: I noticed you are...
Hi,
There are links where your components are mentioned and they are very very old RTL ( Resistor-Transistor-Logic ) integrated circuits from the mid 1960s and 1970s, no precise Western equivalent is given, only their function. I think it is even difficult to find data sheet for such...
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