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Card & cable only. US$50.00/ofr incl shipping to USA.

This is an FYI. If you are into DIY, it is a fairly basic circuit, ala RoyerMod, U47, etc. Needs a larger donor mic, which in this case was a broken MXL V89MBP. The battery powered MXL mics have a slightly larger body, and they seem to come up on Ebay frequently enough in non-working...

Here's a link to the Royer. The Royer Tube Mic Mod for the MXL 2001 Also, here is the M49: here is the BigUgly It has the pattern controlled by a pot. There is a PSU schemo with an incorrect input voltage, I don't have the correct one on this PC.

Just thought I'd share this. Body: MXL V89MPB (broken=cheap) Parts I had on hand including K47 style capsule and a KCM transformer (which are the one's AFAIK FoxAudioResearch uses.) Smoke test sat, Hello world test sat. Schematic: I didn't have a 1uF cap that would fit, so the output...

Buried in house projects, in gear, in working on gear, in broken gear, in not working on broken gear but soldering new gear, looking at schematics, AAARRHRHFHF, trying to blow up capacitors,,,.looking at gear that isn't hooked up, bewildered at hooking up said gear. Oh and then there is regular...

Does changing tube really make a difference in "starved plate" designs? opinions Just curious, You see this come up fairly often, I bought an XXX "tube" preamp and I want to swap out the unbranded tube for a NOS or different modern manufacture 12AX7 (insert famous name here) to make it sound...

Double sided K47 clones and K67 clones; each: USA: US$55.00pp Canada/EU: US$60.00

OK, where did you get the PCB's? I'm now jealous, and need *yet another* DIY project to keep me away from actually making music...:o:D I did just finish a microphone based on the basic Royer/SELA circuit, using a 6AK5 instead of a 5840 and one of my groupbuy 47 style capsules...

This ad has been up for a while. Tascam DBX1's Don't know anything about the guy, but it's a great price. FYI If you don't know, these are dbx Type I NR units, designed for (AFAIK) the Tascam 34/38. They can be easily hacked to work without the control signal.

How do you all do it? I need to calibrate my Tascam 38.

This is kind of a followup to my other post on line level stomp boxes. I still want to run some of these off an existing (for another circuit) +/-15v In the attached, the IC connection is pretty straight forward. As to the transistors, I'm not quite sure how to approach that as to the bias for...

KORG announces the development of an all new ARP Odyssey synthesizer. | News | KORG This is kinda relevant to "analog" as it's well, "analog."

Not sure if anyone has seen this: KORG announces the development of an all new ARP Odyssey synthesizer. | News | KORG Korg is going to release a brand new Odyssey end of the summer!

The one that looks like this on an oscilloscope:

I was wasting time (I know, hard to believe) and came across some cheap (although with shipping not quite as cheap) 6AS7's. They are a low mu (appr 2) high current triode. Using the Plate resistor || plate resistance (I think and I can't offhand remember the abbr.) I'm getting ~200-500ohm Z...

I need to post this over the place, but that "tubes only" headphone amp, is it even theoretically possible? I don't really understand tubes *that well* but let's suppose he found some elves somewhere to roll the perfect triode, would that even work? Directly heated cathode, somehow using the...

Alesis Micro Series User's Guide Printed and Bound in English | eBay Although it is in English. I swear I am going to take a picture of a screw from one of my Arps, put it next to a coffee pot and sell it as a "rare vintage ARP screw" how much should I ask for? Serious, tell me and I'll...

OK, So I threw this idea up a few places. I found this side chain in an old ARRL handbook. Seemed rather intriguing. Uses a 6AL5, but wants the control voltage on the suppressor grid of a pentode. It's for ham use, so intended for a limited dynamic range. So I sketched something out, whose...

1 1/2" NOS for 2 1/4" NOS even trade.

I've thought about doing this w/ a few of the tonepad boards. My thought is to lower the input impedance from 1M down to 50k - 100k, adding somekind of buffer after the output pot or better yet eliminating that pot and putting a simple opamp circuit to have a volume control w/ low output...