Search found 151 matches

by rodabod
Sat Feb 06, 2010 2:32 am
Forum: Creative Recording
Topic: [Group Buy Mic] Ouch... Group Buy mic just SHOCKED me!
Replies: 13
Views: 1947

Same happened to me with an Apex mic. Shoddy construction means that the cable can sometimes short when not inserted properly. I has my hand on the cable and my other on the mic; shock across my chest. Not cool. Also, some of the PSU cases on these mics are not properly grounded - they have earth ta...
by rodabod
Mon Jan 18, 2010 4:32 pm
Forum: Creative Recording
Topic: Odd problem with 51 P-Bass reissue-no sound, except when...
Replies: 4
Views: 1031

Possibly one end of the pickup wires has lifted away from ground.
by rodabod
Sat Jan 02, 2010 6:30 pm
Forum: Creative Recording
Topic: ground issue with 1272 + five fish PSU
Replies: 8
Views: 1429

Does the new supply use a different power transformer located close to the amps?
by rodabod
Sat Jan 02, 2010 6:28 pm
Forum: Creative Recording
Topic: TNC mic "lineage"?
Replies: 27
Views: 8854

That's a standard Shanghai K67-ish copy.
by rodabod
Thu Dec 31, 2009 4:47 am
Forum: Creative Recording
Topic: Troubleshooting Apex 460 Mod
Replies: 7
Views: 2137

You could also check the correct polarising voltages are being sent from the PSU. I can't remember the schematic off the top of my head though.
by rodabod
Thu Jul 30, 2009 4:17 am
Forum: Creative Recording
Topic: El14
Replies: 1
Views: 663

Search for Telefunken EF14 and you will find datsheets. Otherwise look for Frank's Tube Data website.
by rodabod
Tue Apr 28, 2009 11:04 am
Forum: Creative Recording
Topic: failed projects
Replies: 18
Views: 3807

My advice is double-check everything, take your time, and be very very neat with your soldering and wiring. If you can't make a shiny, wet solder joint with the right amount of solder, then don't bother.
by rodabod
Tue Apr 28, 2009 11:01 am
Forum: Creative Recording
Topic: PM100 Output transformer?
Replies: 5
Views: 2110

I think it's more like 1:1.5 actually. Ypu can probably skip your output coupling cap from the PM1000 if it has one since the Neve transformer is gapped to handle DC. Terminate the secondary with a 10nF polystyrene in series with 1K5 to tame slight ringing. The EZ1290 guide shows a simple wiring gui...
by rodabod
Fri Apr 24, 2009 6:53 pm
Forum: Creative Recording
Topic: Mistery Tube mic!! Need help to fix
Replies: 7
Views: 1558

Check the polarisation voltage feeding the front diaphragm. You may need to check back to the PSU where it is derived (IIRC) Circuit is probably a Nady 1050 or something similar. Schematics are around.
by rodabod
Fri Apr 24, 2009 6:47 pm
Forum: Creative Recording
Topic: Apex 460 Grounding Problem?
Replies: 2
Views: 1176

Mic body has lost good continuity with ground. Not sure where it is done on this mic; possibly where the PCBs screw to the chassis, or at the XLR plug.
by rodabod
Mon Apr 13, 2009 9:09 am
Forum: Creative Recording
Topic: Chameleon 7602 Input Transformer Mod
Replies: 21
Views: 7595

For the Carnhill it'll be 180pF and no resistor across the secondary.

It reduces ringing at high frequencies, so possibly expect smoother sound and less phase issues.
by rodabod
Tue Mar 31, 2009 5:58 am
Forum: Creative Recording
Topic: Taking apart an MD-421
Replies: 2
Views: 1155

Remove screw under plate. Draw out bass filter barrel from body gently.

Un-do screw inside body deep inside the recess wgere the filter barrel was. Remove grill.
by rodabod
Thu Mar 26, 2009 7:14 am
Forum: Creative Recording
Topic: i need a beyer 160 repaired.
Replies: 24
Views: 6987

I'd go with Beyer if you want the mic to operate close to the original.
by rodabod
Fri Mar 20, 2009 9:14 am
Forum: Creative Recording
Topic: Are there any mods for the M-Audio Audio Buddy?
Replies: 6
Views: 2122

Re: Are there any mods for the M-Audio Audio Buddy?

It seems like a good platform for some mods, but I can't find any info about it online anywhere. I need a new wall wart for mine, but I don't want to get a new one if I can't make it sound any better. Opamps are SIL from what I remember. It's just a bunch of opamps. Not a great design, plus the pha...
by rodabod
Fri Mar 20, 2009 9:12 am
Forum: Creative Recording
Topic: Measuring Voltage on a high impedance load
Replies: 3
Views: 973

Re: Measuring Voltage on a high impedance load

ckeene wrote: I'm trying to measure a DC voltage at a very high load (somewhere around 15Meg). At this level, do I need to be cautious about my DMM's impedance, lest the reading become inaccurate?
Yes, you'll load-down this resistance with your meter (say 10 Meg) so take this into consideration.