CurtPalme.com Home Theater Forum

mp20748 · Posted: Thu Mar 22, 2018 3:06 pm Post subject:

mp20748 · Posted: Sun Apr 15, 2018 9:14 pm Post subject:

I have more shots to post the next few days and will be discussing a few other things mod related right here, as I prepare for an upcoming event.

I'll also post a shot of what I've been working on in Audio, that is special and personal project of mine that deals with lowering the noise in a phono preamp, and I'll be suing an Op-Amp design for this, which would not be the best solution for lower noise, because once you open an Op Amp to higher gain operation, you also open it up for a higher noise problem. That also includes problems with parasitic oscillation. I'm using some of the same methods I've developed to lower noise in analog video chains. Something I really could get a patent for, because there is has not been a means of looking at HASH Noise and various other noises that are common when any amplifier operates at certain bandwidths and above. And for an FYI, none of the most popular and HIGH END CRT projectors previously manufactured had consideration for these noise problems. From my research over the years dealing directly with insiders in the organizations, there was no need to go after these noise problems, and that a solution would have to be developed that would be extremely time consumer and would not be justified by the cost-cutting-department of these manufacturers. Or to put it a different way, they could not economically justify the time and cost (R&D) necessary to make improvements where the improvements were not warranted. So I not only took on the challenge to produce the first and only higher than specified video chain (1080P). I also took on the task to develop a means to look at these noises. Something that can not be seen by simply using a scope and probe. Some of these noises ate truly invisible without a developed means to know that they are there.

jask · Joined: 17 Mar 2006 Posts: 10165 Location: kamloops BC

That is great news! I will be looking forward to that Mike.
I have been working on restoring an old Tektronix Oscilloscope and thinking that the one thing I really miss ( with the shift to digital ) on this forum is the in depth electronics discussions that used to take place.

mp20748 · Posted: Mon Apr 16, 2018 9:12 am Post subject:

mp20748 · Posted: Thu Apr 19, 2018 10:36 am Post subject:

mp20748 · Posted: Tue Apr 24, 2018 1:07 am Post subject:

I swapped out inductors L8 and L9 for large feritte beads -- Lowered white clipping

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

Excellent images. I should have my head examined for glancing over for a JVC digital. Even thinking about is stupid all I need to do is to Hoist a new one and I too would have an image like this. Or very much like it.

mp20748 · Posted: Tue Apr 24, 2018 1:11 pm Post subject:

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

I got some tax returns coming soon and if the price is right why not just exchange it.

mp20748 · Posted: Tue Apr 24, 2018 2:47 pm Post subject:

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

mp20748 · Posted: Tue Apr 24, 2018 3:15 pm Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4378 Location: Phoenix

Hey Nash

If you don't Blend, you Suck right? LOL

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

mp20748 · Posted: Thu Apr 26, 2018 8:46 am Post subject:

Gotta get around to that ringing problem..

mp20748 · Posted: Fri Apr 27, 2018 12:05 pm Post subject:

Got in a batch of Low Impedance Ceramic capacitors yesterday, and of course swapped them into the video chain. I know I've mentioned this before, that I use this thread also to evaluate what I'm doing. Going with the ceramics does have its benefits, but when looking here I can see gain peaking. Mostly seen in whites, but more pronounced with some lighter combination colors like pink and any lamps or lighting in the images. The caps are as thought, perfect for putting an more intense image on the screen. But it looks like I'll need to decrease the value a bit. I'm replacing C66 and C67 on the neck boards.

The video chain is uses no peaking, as well, no sharpening or enhancements. Just a plain fast and very clean video chain.

Seems like I'm doing more now that I've gotten out of the Mod Business, especially what I've done the past year. I'm a hobbyist now, doing this when I have free time to do so, and only for my own use..

**kal** · Posted: Sat Apr 28, 2018 1:42 am Post subject:

mp20748 · Posted: Sat Apr 28, 2018 1:53 am Post subject:

**kal** · Posted: Sat Apr 28, 2018 2:50 pm Post subject:

Thinking about this some more, and to fair around our forum rules:

Please stop posting about any mods you're doing Mike. You say in your sig "We are still supporting any previous work". By posting about these mods that you're still doing yourself, just for yourself, opens up the opportunity for you to do these mods for your past customers and charge them for it. You are basically advertising your work every time you post screenshots here. Self-promotion is not allowed.

You're also only infuriating your existing customers who are unhappy, and there seem to be many, and they're vocal. They're using our forum as a means to have a shouting match with you about your past work.

So please stop posting about whatever mods you're doing if you are in any way still in business, which you are, according to the comment in your sig: "We are still supporting any previous work."

Kal