Talking about tube amps, I got a Lafayette LA-214A tube amplifier from
someone about 20 years ago. It's got EL-84 power tubes, 1 for each
channel if I remember well (class-A). I did restore it a bit, the
sound is great and I really like the design as well.
http://xiac.com/Images/Lafayette_LA-214A.
For in the bedroom, I find the 1x6 mux (at standard current) to be of
acceptable brightness. On the contrary, a 1x6 mux VFD clock that I built is
_way_ too bright for the house (like you can't sleep for the blue glow). I
took the VFD clock to the office and it looks fine there.
Relative brightness
On 9/19/12 6:39 PM, dr pepper wrote:
So why is multiplexing a bad idea, and static displays make tubes last
longer?, does multiplexing accelerate cathode poisoning or something?
I have 3 or 4 prototypes I've put together and they all use
multiplxing, even the single tube ones use pwm as a brightn
I don't think that multiplexing is a bad idea.. On the contrary, it should
extend the life (provided that you don't drive the tubes at more current
than they are rated for). That's the key, really.. I think that most people
drive the tubes at significantly higher than rated currents when they
multi
So why is multiplexing a bad idea, and static displays make tubes last
longer?, does multiplexing accelerate cathode poisoning or something?
I have 3 or 4 prototypes I've put together and they all use
multiplxing, even the single tube ones use pwm as a brightness control
(and so probably inherit th
I'm assuming you're talking about the analyzer? The spectrum analyzer chip is
MSGEQ7, which comes in DIP-8 and SOIC-8. You can find it on sparkfun in the DIP
package, but the SOIC version is harder to find. I'll dig up the place where
you can get it if you want.
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Mind sharing the component part number?
On 9/19/2012 2:41 PM, Dan Foster wrote:
As for why 7 channels, I found a little IC that breaks down audio into DC
components (7 to be exact). I have found a fft that runs on AVR
microcontrollers but am not sure of its accuracy or how quick it is. So for
Yes, I've seen a lot of neat ones on YouTube. All of them are rather large,
though. My board is 3.2 x 1.25 if I remember correctly. So hopefully that's an
advantage.
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Awesome...now that is some Audiophool bling! I want one!
On Wed, Sep 19, 2012 at 2:37 PM, Michel wrote:
> Nice idea! Have you see this 20 tube model already?
>
> http://www.youtube.com/watch?feature=endscreen&v=NqsuAlrJUOc&NR=1
>
> Michel
>
>
>
> On Sep 20, 7:34 am, Adam Jacobs wrote:
> > It wo
As for why 7 channels, I found a little IC that breaks down audio into DC
components (7 to be exact). I have found a fft that runs on AVR
microcontrollers but am not sure of its accuracy or how quick it is. So for now
I'm using the IC. I will definitely investigate the fft when I can.
--
You
Nice idea! Have you see this 20 tube model already?
http://www.youtube.com/watch?feature=endscreen&v=NqsuAlrJUOc&NR=1
Michel
On Sep 20, 7:34 am, Adam Jacobs wrote:
> It would be cool to make one with more channels for analyzing the
> quality of your amateur radio transmissions.. Something to
It would be cool to make one with more channels for analyzing the
quality of your amateur radio transmissions.. Something to think about
for another day. :) My Swan 500c puts spurious emissions all over the
place. I probably don't want to know what they look like. :S
-Adam
On 9/19/2012 2:31 P
Ascending and descending orange glow tubes, why wouldn't it sell! I'd
probably tinker with one...;-) Why only 7 channels? May I ask what
frequency ranges you decided to sample?
Nick
On Wed, Sep 19, 2012 at 2:28 PM, Adam Jacobs wrote:
> Pretty neat. As an audiophile toy, I suspect that it would
Pretty neat. As an audiophile toy, I suspect that it would sell well.
Something to put on top of that all-tube amplifier.
-Adam
On 9/19/2012 2:02 PM, Dan Foster wrote:
Hello everyone,
I am thinking of selling a IN-13 spectrum analyzer, either fully
assembled or in kit form. I've just ordered
Hello everyone,
I am thinking of selling a IN-13 spectrum analyzer, either fully assembled
or in kit form. I've just ordered the preliminary boards to get the final
prototype together, but it would be 7 bands with a 3.5mm jack input. 12v
input from wall power, and possibly a mini USB port. The
> I've been thinking about writing an article or series of blog posts
> targeted at beginners who may want to try their hand at building their
> first nixie clock. There's plenty of information out there about nixie
> tubes and specific clock projects, but I haven't found much about the
> entire pr
Are these guys going to share or sell this board and the uP code?
On Tuesday, September 18, 2012 4:35:23 AM UTC-4, fixitsan wrote:
>
>
> http://www.eetimes.com/electronics-news/4396235/Microchip-s-Nixie-Tubes-light-up-Design-East?cid=NL_MCU&Ecosystem=microcontroller-mcu#180032
>
>
--
You receiv
I am using the HV5522. It works like a charm. Two for 64bits and I am direct
driving six tubes. It made both routing and programming easier.
This is my very first nixie project, so on the next one I will try some
multiplex to bring the cost down, as this is the only down side I see on the
super
On Tuesday, September 18, 2012 5:05:29 PM UTC+1, NeonJohn wrote:
>
>
>
> If I were designing a Nixie clock right now (wish I had the time!), I'd
> be taking the same approach. One processor per tube, a processor for
> feature control such as remote control and motion sensing and a master
> pr
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