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Author Topic: Humming along...  (Read 18282 times)
channelmaniac
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« Reply #25 on: October 28, 2009, 01:10:55 PM »
Reminds me of a song full of fish puns I once heard on Dr. Demento.

I miss that radio show.  bawling
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stayouttadabunker
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« Reply #26 on: October 28, 2009, 01:25:30 PM »
http://www.amazon.com/gp/recsradio/radio/B000056W0C/ref=pd_krex_dp_001_004?ie=UTF8&track=004&disc=001
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CaptainHappy
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« Reply #27 on: October 29, 2009, 02:42:16 AM »
I knew that Stafreak would fall for the post HOOK LINE AND SINKER!!! Cry Laughing Cry Laughing Cry Laughing

CH CaptainHappy
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« Reply #28 on: October 29, 2009, 05:21:44 AM »
Quote from: CaptainHappy on October 29, 2009, 02:42:16 AM
I knew that Stafreak would fall for the post HOOK LINE AND SINKER!!! Cry Laughing Cry Laughing Cry Laughing

CH CaptainHappy

SHEET Tongue Out, nothing gets BASS you SEA H. Crazy  I thought I SMELT a RATTAIL. cheese  MINNOW I can't SEA BAIT like that and KNOT come up with at least one BARB.

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Op-Bell
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« Reply #29 on: October 29, 2009, 05:36:12 AM »
I can't think of any nautical jokes, but I love the pictures on the pinhacks page. One about 2/3 of the way down, the EPROM hack, nothing to do with transformers or fuses - there's another thread on the site about this. Notice the EPROM type is a 2716 made by NEC. Originally it would have been a Texas Instruments TMS2716, which has a slightly different pinout and can't be programmed by any EPROM programmer made in the last 20 years. If you need to replace one you have little alternative than to use a proper 2716 and rewire the pins.

I tend to agree with Mr Pinballtip about the transformer - they rarely fail, and the problem is very likely elsewhere. That is if there's even a real problem. The trafo looks in excellent condition in Stout's photo, no blackening or visible signs of distress. Think about what a transformer is - a big powerful alternating electromagnet with a substantial quantity of thin iron plates. Everything in a transformer wants to shake in time with the magnetic field - each of the laminations, the coils, the frame, the screws, and any other metal close enough to feel the field. As they get older, inevitably something in there starts to work a bit loose and it begins to hum. The chances of you being able to find the loose part and fix it are slim. The magnetic field strength depends on the load current, so if a fault develops a previously quiet trafo may suddenly start to buzz fiercely, which is a sure sign to look for smoke. But if the buzz just crept up gradually, you can either live with it or not. A lot of transformers, especially in domestic equipment, are vacuum impregnated with varnish to stick everything firmly together. If you send your transformer to be rebuilt and the shop has the equipment to do this, it may well come back looking like it tripped over and fell in a glue pot. That may in fact be the only treatment it receives.
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stayouttadabunker
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« Reply #30 on: October 29, 2009, 12:00:09 PM »
I agree with you Op,
I think I may still get the transformer "re-glued" at a shop...lol
I think my floor heater (when on fully at 1,750 watts) was what pushed the
laminated plates to their limits and caused the transformer to buzz like that.
I also think it was due to the large temperature differences from the cold garage and switching on the juice.
The transformer works great now that it's in the warm house!
It's not loud at all now.

oh, speaking of hacks, I love the last picture of the "Golden Arches".... Tongue Out
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channelmaniac
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« Reply #31 on: October 29, 2009, 01:59:23 PM »
Op...

I have a programmer (Data I/O Series 22) that will program the TMS2716 chips and I have 60+ of those chips here in the bins. Wink

RJ
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Op-Bell
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« Reply #32 on: October 29, 2009, 02:24:23 PM »
Quote
I have a programmer (Data I/O Series 22) that will program the TMS2716 chips

Shhh!  muted  You'll have lots of friends! That's good to know, though. Series 22 - was that made in the last 20 years?

As far as I know, the only programmer in current production that can do those suckers is the Unisite XPI, which brags that it supports every programmable device ever made back to the 1702.
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channelmaniac
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« Reply #33 on: October 29, 2009, 04:58:04 PM »
I'd love to find something that can do the 1702... that's the one big hole in my programming capabilites.

Between the Data I/O Series 22, it's add-on PROM module, and the ROMMax from eeTools, I can do most older PROMs and EPROMs.
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Op-Bell
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« Reply #34 on: October 29, 2009, 06:20:19 PM »
Quote
I'd love to find something that can do the 1702... that's the one big hole in my programming capabilites.

If I recall correctly, it involved driving the data lines with minus 48 volts for logic 1!

Last item on this page

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channelmaniac
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« Reply #35 on: October 29, 2009, 08:44:34 PM »
DAMN!

$695 for that 1702 adapter? Insane.

I'll dig around surplus stores the next time I'm in San Jose...
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stayouttadabunker
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« Reply #36 on: October 29, 2009, 08:54:43 PM »
You could probably make one if you could get your hands on the schematics?
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knagl
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« Reply #37 on: November 08, 2009, 10:40:52 AM »
Quote from: channelmaniac on October 29, 2009, 04:58:04 PM
Between the Data I/O Series 22, it's add-on PROM module, and the ROMMax from eeTools, I can do most older PROMs and EPROMs.

PE+ CAP chips?  propeller
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channelmaniac
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« Reply #38 on: November 09, 2009, 05:24:33 AM »
Quote from: knagl on November 08, 2009, 10:40:52 AM
Quote from: channelmaniac on October 29, 2009, 04:58:04 PM
Between the Data I/O Series 22, it's add-on PROM module, and the ROMMax from eeTools, I can do most older PROMs and EPROMs.

PE+ CAP chips?  propeller

Got a part # on the IC chip?
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