I have tested the frequency response of my microphone. I found a nice tool for linux to convert a sinesweep to a spectogram: ...
17955
Martijn van Beurden
ktficer
Apr 13, 2012 8:25 pm
Hi all, *Introduction* First of all, thanks for sharing this great collection of information here. Last year is stumbled upon this group quite often in various...
17956
ricardo
ricardo_lee
Apr 14, 2012 6:09 am
... Duu.uuh! Tube from a packing crate but damping wedge hand carved from solid Unobtainium by virgins. Well Vlad. You got 3 very different designs to try....
17957
LESLIE WATTS
wattsfurniture
Apr 14, 2012 10:51 am
... From: ricardo To: micbuilders@yahoogroups.com Sent: Saturday, April 14, 2012 2:09 AM Subject: [micbuilders] Re: Pipe as planewave generator ... What? so...
17958
kristof Bastiaensen
kuribas
Apr 14, 2012 8:09 pm
Hmm, I am thinking this -3db dip at 10kHz dip might be a peak in the response from the superlux measurement mic. Kristof...
17959
ricardo
ricardo_lee
Apr 14, 2012 8:33 pm
... You're probably right. All I can really tell from the measurement is that your ribbon has "extended"; LF response. What distance was the speaker from the...
17960
kristof Bastiaensen
kuribas
Apr 14, 2012 8:50 pm
... I measured about a meter from the speakers, and a meter from the ground. There also where buildings on the sides, and cars passing... I also want to...
17961
Mark
stangiii
Apr 14, 2012 9:14 pm
... This thread has been really interesting. Thanks! -- Mark....
17962
vladimir_godyna
Apr 14, 2012 11:14 pm
I've read some horn theory (thanks to Martin J. King): http://www.quarter-wave.com/Horns/Horn_Theory.html Why not to use exponential horn from mouth to throat?...
17963
Sergei Steshenko
sergstesh
Apr 15, 2012 2:15 am
Hello All, came across this: http://femhub.com/nclab-com/ , https://nclab.com/ in Octave list. It's for those who need to do some math (including symbolic),...
17964
gus
leudar
Apr 15, 2012 10:49 pm
Anyone know where I could get hold of 6 Transound TSB-140A capsules in or near the UK ?...
17965
Gerard Lardner
gerardlardner
Apr 15, 2012 11:01 pm
I live in Ireland; I bought some direct from JLI Electronics and found the service excellent. Indeed I've made two more purchases from JLI Electronics on the...
17966
gus
leudar
Apr 15, 2012 11:08 pm
Hi - its just they charge $23 for postage - which seems a lot for 6 tiny capsules but mainly it says they can take up to 15 days to arrive and Im in a bit of a...
17967
gus
leudar
Apr 16, 2012 12:35 pm
Just to keep anyone interested updated - I decided to buy from jlielectronics.com anyway and Im glad I did - I put the wrong shipping address in and they have...
17968
umashankar
umashanks
Apr 16, 2012 12:44 pm
just think gus, how much more i pay when i ordered them here to india! china is next door, but it still cheaper to get it from jli (if you discount shipping)....
17969
gus
leudar
Apr 16, 2012 1:15 pm
Jeez - I'd heard they were tasty capsules - but I didn't realise they were that good !...
17970
Bilbal
bilbal44
Apr 18, 2012 2:03 am
KitsRUs Kit 98 has potential as a mic. headamp. ( www.kitsrus.com/pdf/k98.pdf ) Replacing C6 with an electrolytic 150mfd extends the -3 db low end...
17971
electra_toy
Apr 18, 2012 1:56 pm
Hello Colin Did you figured out how to wire this mic to use it for other purposes? I also own such a mic and would like to use it. Thanks electra...
17973
Martijn van Beurden
ktficer
Apr 19, 2012 9:32 am
After a little more study, I guess I understand the circuit and the differences between all versions here. However, I still have one question left. In...
17974
ricardo
ricardo_lee
Apr 19, 2012 5:09 pm
... The Zeners across the output transistors serve 2 functions. - If the transistors are low voltage, they protect against Vbe failure - Even if the...
17975
bhakakhan
Apr 19, 2012 5:28 pm
... Look at the Voltage vs. Current plots of zeners... in short words: They only conduct @ their zener voltage. Under normal operating conditions of the...
17976
sethinspain
Apr 20, 2012 7:04 pm
Hi everyone, I am in the middle of building a DIY preamp and getting very excited as I'm in the stages of hooking up the transformer to the PSU and getting...
17977
Ken Winterling
wa2lbi
Apr 20, 2012 7:20 pm
Seth, UNPLUG the power to the primaries. Set your meter to read ohms. Using the FP30-400.pdf showing the schematic of the transformer see if you measure...
17978
sethinspain
Apr 21, 2012 6:28 am
Hi Ken, Thanks for the quick response. I didn't put that it's my FIRST DIY project so I never thought to check continuity between pins. Yes, I did in fact...
17979
Scott Helmke
scott_helmke
Apr 21, 2012 12:26 pm
Where's the rectifier in the circuit? Before or after the transformer? -Scott ... -- ... And you'll visualize not taking any chances But meet them halfway...
17980
Ken Winterling
wa2lbi
Apr 21, 2012 12:46 pm
Seth, Are you sure the transformer is getting power? Since you haven't provided a schematic or what test equipment you have we are all helping you "blindly"....
17981
sethinspain
Apr 21, 2012 1:54 pm
Hi Scott, The rectifier is after the transformer....
17982
sethinspain
Apr 21, 2012 2:14 pm
Ken, You're a life saver! I'll try and give as much info as I can. I also try to avoid providing redundant info as to not make for boring reading =p. ...
17983
Rev Tony Newnham
tonyn52
Apr 21, 2012 3:46 pm
Hi Silly question - you are measuring the voltages on the transformer with the meter on an AC range? Every Blessing Tony From: micbuilders@yahoogroups.com...
17984
sethinspain
Apr 21, 2012 3:55 pm
Hi Tony, Yes, I am =). I wish that had been the problem! Seth...
