- TV Picture: What Does "Calibration" Mean??? - 1 Update
- Sony Detector transformer needed - 4 Updates
| Tim R <timothy42b@aol.com>: Oct 28 07:00AM -0700 > serious. And they live with their TVs looking > like cartoons not knowing that they are getting > only 5% of out of their investment's potential. We bought our first flat screen this year when a CRT finally died. (still have 3 more in the garage, can't get rid of them) I did not know there were settings until I read this thread. I do recall the colors didn't look quite right at first, but ....sigh......we got used to them. So you're making a good case for some adjustments. Is this stuff in the owner's manual? |
| "Rheilly Phoull" <rheilly@bigslong.com>: Oct 28 06:09AM +0800 "N_Cook" wrote in message news:n0o5a3$idm$1@dont-email.me... On 27/10/2015 12:04, Tim Schwartz wrote: > Tim Schwartz > Bristol Electronics > tim@bristolnj.com If that Tx is showing corrossion then any ceramic resonator is probably gone ohmic . What does "Gone Ohmic" mean ?? |
| dplatt@coop.radagast.org (Dave Platt): Oct 27 04:58PM -0700 >HP-210 > Anyone got a scrap unit that they'd be willing to pull the transformer >or board from and sell me? You might want to post a query on the FM-tuners group on Yahoo (affiliated with the www.fmtunerinfo.com site). Lots of tuner collectors and tuner-repairers hang out there, and they may be your best chance to locate a parts unit. From the look of the schematic of one of the models you cited, it looks as if the Sony transformer is essentially a standard one for a ratio detector, with a center-tapped primary and with a cap across the full primary winding (presumably to resonate it at 10.7 MHz, adding some amount of IF filtering). You might be able to adapt a more common ratio-detector transformer (if you can still find one, and if it has a center-tapped primary winding) by adding such a cap. Unfortunately it looks as if ratio-detector transformers are pretty much unobtanium these days, at least on the new-parts market. Opening up and rewinding a 10.7 MHz IF transformer to add the extra winding and the resonating cap(s) might turn out to be your only solution, if you can't find one in a junked Sony. |
| M Philbrook <jamie_ka1lpa@charter.net>: Oct 27 08:35PM -0500 In article <z_-dnaE0EeGYa7LLnZ2dnUU7-QmdnZ2d@westnet.com.au>, rheilly@bigslong.com says... > If that Tx is showing corrossion then any ceramic resonator is probably > gone ohmic . > What does "Gone Ohmic" mean ?? as in, it shows resistances via an Ohm meter? more like, leaking DC, or leaking period.. Jamie |
| dplatt@coop.radagast.org (Dave Platt): Oct 27 05:50PM -0700 In article <MPG.3099f059a50d5db7989d5b@news.eternal-september.org>, >> What does "Gone Ohmic" mean ?? >as in, it shows resistances via an Ohm meter? >more like, leaking DC, or leaking period.. Or, has had its internal series resistance increase to unacceptable levels; this would lower the Q of the resonant circuit, increase losses, and make it less effective as a narrow-bandwidth filter. |
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