I am having some trouble finding the C11 and C10 Trimmer and variable caps. Does anyone know a source of these? I'm using the exact coil sizes as mentioned...
101
wjcourson
Jul 15, 2010 12:11 am
Great vid. Thanks for posting it....
102
Philip
kmg5443
Jul 15, 2010 4:08 pm
Thanks! It was a fun, informal, relaxed gathering. Somewhat loud due to acoustics. All the conversation was from an adjoining corridor...the door to the...
108
Philip
kmg5443
Oct 14, 2010 4:14 pm
When I was building my Keppinger theremin, I recall that it sounded wonderful. What was not wonderful was the issue that the oscillators would not keep...
109
mkepp@...
thereminmaker
Oct 14, 2010 4:42 pm
Philip; I originally had the resistors at 100K. The coupling capacitance (you said resistance, but we know what you meant) of .001 mfd would give a time...
110
Philip
kmg5443
Oct 14, 2010 6:43 pm
The resistor. I'm going to put it back to 100K and change the cap to a lesser value....
111
mkepp@...
thereminmaker
Oct 14, 2010 7:45 pm
Lemme know what happens. FYI: Not public knowledge (yet), but I just got back my first two prototype circuit boards for my next tube Theremin! Based on my...
112
Philip
kmg5443
Oct 14, 2010 8:11 pm
Guess the solid state design died on the vine or got boring/put off to a better day. Contact me if you need assistance. Got a tentative gig planned for May...
113
mkepp@...
thereminmaker
Oct 14, 2010 9:04 pm
Philip; Solid state version is still out there; I just haven't had much time to work on it lately. The second tube version uses the same grid cut-off volume...
114
Philip
kmg5443
Oct 15, 2010 2:37 am
Yes!! Had the big museum gig almost a year ago, then one right before Christmas for the Methodist Adult group dinner at our church (asked), then the March Art...
115
Philip
kmg5443
Oct 15, 2010 2:38 am
Big coils are very good. Many comments from Kevin Kissinger and others relate to the extreme linearity of the playing field. Coupled with RCA replica aerials,...
116
Philip
kmg5443
Oct 28, 2010 1:45 pm
Look at this http://www.pegna-instruments.com/index.html For those out there building a Keppinger, keep it up. These may sound as good as a standard Etherwave,...
117
Philip
kmg5443
Dec 28, 2010 7:49 pm
http://www.youtube.com/watch?v=iokXM9zChaQ Philip and Sheri Neidlinger...
118
Philip
kmg5443
Dec 31, 2010 5:01 pm
http://s980.photobucket.com/albums/ae286/panelectronica/Gabriella%20Photos/ The flickr link is no longer active. Philip...
119
wham634blat043
Feb 5, 2011 6:16 pm
Was wondering if Mark completed the build of his two new prototype 7 & 9-pin tube-based PCBs being worked in October? Thanks. - Best Regards...
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Mark Keppinger
thereminmaker
Feb 5, 2011 6:50 pm
I have one unit built up but haven't had much time to do anything with it, other than correct a couple of minor circuit board design issues... Mark ... From:...
121
Chad W
arrowcw29
Feb 18, 2011 1:11 am
Hi... My name is Jack and I am new. I am interested in building a vacuum tube Theremin. After searching the internet, it seems like the Mark Keppinger's...
122
mkepp@...
thereminmaker
Feb 18, 2011 1:48 am
Jack; It's good to hear from you. There have now been a number of people who have completed Theremins based on my design. Welcome aboard! My goal wasn't to...
123
Gergo Palatinszky
palagergo
Feb 18, 2011 9:37 am
Hi, It means you will use low voltage as well in the new design? 12-24 V or so? Might it would be a good idea as simple wall wart power supply can be used...
124
Mark Keppinger
thereminmaker
Feb 18, 2011 12:53 pm
Pala; The power supply will still be regulated to +150 volts DC. The problem with a wall transformer (other than the low voltage) is that there wouldn't be...
125
Chad W
arrowcw29
Feb 18, 2011 8:33 pm
... Mark.... Bring a sample circuit board to the Hamfair (Polk County Fairgrounds?). I will be coming down with some vacuum tube buddies. I'll look for you. I...
126
mkepp@...
thereminmaker
Feb 18, 2011 8:37 pm
Jack; I'll try and remember to bring my prototype boards. I don't know where my booth will be, but it will probably be one of the more crowded booths with some...
127
Chad W
arrowcw29
Feb 18, 2011 8:41 pm
Folks... I have uploaded a small pdf file to the file area: http://launch.groups.yahoo.com/group/kepptheremins/files/ It is a six page schematic drawing which...
128
mkepp@...
thereminmaker
Feb 18, 2011 8:59 pm
Jack; Any Theremin related information that may assist those wishing to build Theremins is welcome here! I encourage folks to experiment and make modifications...
129
Jack Honeycutt
arrowcw29
Feb 19, 2011 12:03 am
... That would be great. I would love to see them. ... I'll bring my vacuum tube wish list with me. My ham buddy will be at the hamfair. His name is Chuck...
130
mkepp@...
thereminmaker
Feb 19, 2011 12:08 am
Jack; Is Chuck with the emergency response trailer back between the buildings? I usually go down and buy stuff I wasn't really looking for. But you get to a...
131
Jack Honeycutt
arrowcw29
Feb 19, 2011 3:52 pm
... I believe that is where he will be. ... I know what you mean! See 'ya. jack...
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Kendrick Sellen
kendricksellen
Feb 19, 2011 4:33 pm
Does anyone have I.F. transformers @ 455kHz? for sale? I need two. Also need two @ about 200kHz? two with CT. Craig s To: kepptheremins@yahoogroups.com From:...
133
Jack Honeycutt
arrowcw29
Feb 21, 2011 6:19 pm
... Hi Craig.... I am just starting to gather parts for the Keppinger build. My first choice for electronics is Mouser: http://www.mouser.com/ I know they...
134
Jack Honeycutt
arrowcw29
Feb 21, 2011 6:29 pm
Hi... I am about ready to buy parts for the Keppinger Theremin. I am going to do this build: ...
