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- Do NTE series ICs exist - 5 Updates
- How can the same FM station appear at two different spots on the dial? - 3 Updates
| dave <ricketzz@earthlink.net>: Oct 31 07:54AM -0700 On 10/31/2014 04:57 AM, N_Cook wrote: > eg NEC uPC1167 FM radio IC of circa 1980, apparently equivalent to > NTE1488, complete with apparent datadsheet with OCR/translation errors > from Japanese original data sheet Only use NTE as a last resort. Digikey, Mouser both ham/experimenter friendly. MCM (Farnell?) good folks too. |
| John Robertson <spam@flippers.com>: Oct 31 08:35AM -0700 On 10/31/2014, 4:57 AM, N_Cook wrote: > eg NEC uPC1167 FM radio IC of circa 1980, apparently equivalent to > NTE1488, complete with apparent datadsheet with OCR/translation errors > from Japanese original data sheet NTE parts are real, they simply relabeled existing parts. Probably have a huge inventory of spares, but they did always ask a premium price for these. They were used in the Radio/TV/VCR repair industry, originally called ECG and they were bought out by NTE. John :-#)# -- (Please post followups or tech inquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| jurb6006@gmail.com: Oct 31 08:36AM -0700 In th old days alot o shops used them. I avoided it because I could usuall get te OEM for less. The 123 and 159 for exa,ple were just 2N3904 and 6. I used to joke that you pay more for the bag than the part. Actually NTE was not first. Their "line" was the same as ECG which was Sylvania, ECG stood for Electronics Components Group while NTE stood for Nu Tone Electronics. Another cheap brand using the same cross reference was ERS, and those were not even as good as the others. And none of them ever made a part. They simply remarked them, and sometimes didn't even do that. The SK line sold by RCA was actually better quality, and of course RCA mad/makes some semiconductors. I imagine they have access to better ones and can control the quality better. They used a totally different set of numbers though. In my work, I got to the point where I didn't even bother with part numbers. the application told me what was needed, and for those who say that ain't kosher, I remind you that most shops used ECGs or NTEs which was much worse. My system was better. For example 2SC1887 replaces 2SC1885 for most line oiutput in RCA NTSC sets of certain years. They are identical except the 1887 is a bit beefier. So I can buy 20 of those and get the discount instead of buying ten 1885s and ten 1887s. Upgrading a line output transistor in the US has been perfectly kosher since about 1976 when it became illegal for the safety of the set to depend on the failure of a seiconductor device. Before then they counted on the transistor failing to keep the HV should certain faults occur which would ake it rise to undesirable levels. Same with the 2SC1881 replacing the 1879, they are slightly different than the 1885/7, but the same as each other. And then in audio there were the popular pairs to blow the 2SC3280 and 2SA1301. Well of course I gave them 2SC3281 and 2SA1302. Certain transistors are critical though, bias transistors in amps I like to stick with the original if at all possible, in fact oin most audio when it comes to the audio chain itself. When it comes to voltage regulators, relay drivers etc., it really doesn't matter. But for transistors that actually amplify audio or video, you want the specs really close. That means looking at the spec sheet. I bought the books in the old days, not I just get them online. I have very little problems finding most replacement parts for old stuff. Alot of people like me started doing the same thing and that pretty much marginalized these replacement lines. And now, lately I needed an FM IC for a Technics receiver and has no choice but to use an NTE, and the thing didn't work right. No choice at all. I have stayed away from those thing if possible for at least twenty years. |
| dansabrservices@yahoo.com: Oct 31 08:45AM -0700 I too rarely use NTE unless there is no alternative. That being said however, I do have a large selection in stock of both NTE and ECG components. I often need to use these for anyu germanium replacements. If you need a specific one that is no longer available, let me know. I may have one or two. Dan |
| N_Cook <diverse@tcp.co.uk>: Oct 31 04:01PM > I too rarely use NTE unless there is no alternative. That being said however, I do have a large selection in stock of both NTE and ECG components. I often need to use these for anyu germanium replacements. > If you need a specific one that is no longer available, let me know. I may have one or two. > Dan So whatever the NTE or CGE label says, the underlying IC would be original Sanyo/NEC/Harris or whatever of the 1980s or even 1970s? |
| dave <ricketzz@earthlink.net>: Oct 31 07:41AM -0700 On 10/28/2014 08:40 AM, Michael Black wrote: > It's murky whether that was the specific cause of the rule or not, and > probably made murkier since it's been forty years since I read about this. > Michael Cheap consumer radios are using pretty exotic methods to reduce the mass and the current draw these days. Any oscillators are deep into the chipset. |
| dave <ricketzz@earthlink.net>: Oct 31 07:45AM -0700 On 10/28/2014 11:11 PM, micky wrote: >> digitally tuned. But I'd think it would "lock" to the statino further up, >> that presumably is stronger at that point than the first station. >> Michael The fcc.info link I sent lets you search the FCC database in a friendly gui fashion |
| dave <ricketzz@earthlink.net>: Oct 31 07:49AM -0700 On 10/29/2014 02:30 AM, Arfa Daily wrote: > shadow' across a large swathe of territory on the 'downstream' side > Arfa >>> Michael An obstruction in the energy field creates Fresnel Zones on the side of the obstruction opposite the antenna. These are alternating peaks higher than normal and dips lower than normal. The distance between the peaks and nulls (Fresnel Zones) is determined by the distance between the antenna and the obstruction. |
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