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Post by Admin on Aug 3, 2013 15:07:23 GMT
Have you ever experienced damage to equipment caused by voltage surges? Well, Neil, Radio8Z, offers a simple solution that may well prevent "junk" on your audio lines from damaging your equipment. This simple circuit can limit voltages, preventing damage. You can alter the circuit to either increase or decrease the allowable voltage. Visit TheALPB.com and look for Neil's article on the How To Do It page. You'll find a link to How To Do It on the MORE LINKS page. Attachments:
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Post by Admin on Aug 14, 2013 15:03:47 GMT
Carl Blare shows us his ALPMIC. This is a great sounding microphone you can build for pocket change. Check it out at the ALPB How To Do It page. Attachments:
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Post by Admin on Aug 14, 2013 15:15:43 GMT
Do you have one of those microphone shock mounts that suspends the microphone with elastic bands? When those elastic bands lose their stretch, buying a repair kit can be expensive. Johny C. of RAG-FM has an easy, inexpensive fix for that; HAIR BANDS. Yeah, a couple bucks will buy you a handful of elastic hair bands that work quite well. See Johny's fix at the ALPB How To Do It page at thealpb.com . Attachments:
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Post by Admin on Sept 29, 2013 15:27:58 GMT
Ever have your Weller Soldering Gun tip burn out just before you finished a job? Neil at Radio8Z has a How To Do It tip to keep that gun humming. Check it out at The ALPB How To Do It page. thealpb.com/how-to-do-it.html |
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Post by Deleted on Sept 30, 2013 13:34:43 GMT
From an early age I have always had one of those classic Weller Guns, and the standard tips broke all the time, right in the middle of rush jobs.
Knowing Neil's "quick fix" is even better than using duct tape.
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Post by Deleted on Oct 3, 2013 0:13:50 GMT
The Alpmic as presented in the "How To" depiction may have a fatal flaw.
I knew this going in, and I hoped there might be some feedback about observations from forum visitors, but all has been silent.
In the circuit Version 12.8.i the two capsules are wired in parallel, with impedance loading such that the output would present 1/5, or 120-ohms, to the 600-ohm input of the mixer, according to the instructions from Neumann Microphone Company.
However, I ignored the fact that capsules wired in parallel also feed into each other, thus off-setting the ultimate result.
In listening tests over a period of time I came to believe there was a clipping distortion resulting from the situation; not much, but just enough to disturb the audio quality of the mic.
I still hope to hear comments on the aspect just raised, but I have gone on to further versions. Two, in fact, only one of which I have tried.
I will sit back in the back of the ALPB web space awaiting a reply.
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Post by Admin on Oct 3, 2013 12:00:57 GMT
Perhaps a small value of resistance connected to the output of each capsule would stop or reduce clipping. Visualize two resistors in series between the two capsule outputs with the junction of the two resistors connected to the transformer.
This would allow each capsule signal to develop without the clamping effect of the other capsule output stage similar to a simple passive mixer.
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Post by Deleted on Oct 21, 2013 22:38:51 GMT
I thought of a "How To" that could be posted as a joint venture, with me getting credit for the basic idea, and other contributors actually knowing the technology for explaining the numbers involved.
Here's the deal. I have a Panasonic FM tuner providing the audio for an AMT5000 transmitter, but the audio on the line is not quite enough to get 100% modulation.
The solution, I think, instead of adding an active line amplifier, could be a step-up transformer!
I may actually do it, but if someone wants to draw it up, go ahead.
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