- Need a transistor for a '70s Zinger Color Organ - 6 Updates
- Devices to fool the Power Meter - 2 Updates
- Looking for a schematic of TORE SEEM L2003 - 1 Update
| naglenz59@gmail.com: Jun 26 05:06PM -0700 Hello. The Zinger is a six light alternating and flashing unit. It could run either on with varied speeds or connected to a speaker wire or radio output to pulse with the music. I am trying to fix this bedraggled old thing ... I know, glutton for punishment. Anyhow, the transistor (which is quite toasted) is a Toshiba FIR3D41. I can find no info online about this part or what the replacement might be. Based on what it is supposed to do, are there any suggestions for a replacement? It is 120v and the model number is 528. Thanks for any info ! |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 26 05:36PM -0700 >Toshiba FIR3D41 <https://m.bukalapak.com/p/elektronik/komponen-elektronik/7ospx4-jual-scr-fir-3d-fir3d> It would seem to be an SCR, triac, thyrsistor, or something similar. The 41 looks like a date code or lot number. My guess is the real part number is FIR3D. <https://www.bukalapak.com/products/s/scr-fir3d-fir> Looks like they're in Jakarta Indonesia. So, all you need to do is find someone who speaks the language, create an account on: <https://www.bukalapak.com> and order the parts. I've been looking for the data sheet on the FIR3D, but haven't found anything because the phone keeps ringing. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| dplatt@coop.radagast.org (Dave Platt): Jun 26 05:49PM -0700 In article <d5ccabd3-5486-4545-991e-527e79e4a1a4o@googlegroups.com>, >I am trying to fix this bedraggled old thing ... I know, glutton for punishment. Anyhow, the transistor (which is quite toasted) is a Toshiba FIR3D41. I can find no info online >about this part or what the replacement might be. Based on what it is supposed to do, are there any suggestions for a replacement? It is 120v and the model number is 528. Thanks >for any info ! I have a feeling that you will probably need to trace out the circuit and draw a schematic, in order for anyone to figure out the actual requirements. I suspect that the FIR3D41 code might be either a house number, or a manufacturing date code. I have little doubt that there are compatible parts available today (probably an arm's-length list of them) but without a schematic it's going to be really difficult to select one. |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 26 06:36PM -0700 >Toshiba FIR3D Google translate works well enough in the Chrome browser to decode the Indonesian. I dug through a mess of semiconductor logos and found the "T" logo as possibly belonging to Toshiba. I don't believe it, but that's what it claims: <https://how-to.fandom.com/wiki/How_to_identify_integrated_circuit_(chip)_manufacturers_by_their_logos/P-T> Scroll down to the "T" near the bottom of the page. The consensus seems to be that it's an SCR. <https://mufarielectronic.wordpress.com/2012/05/23/scr-fir3d/> <https://www.tokopedia.com/d21r/scr-fir3d-thyristor-fir3d> <https://salinsalim.wordpress.com/category/rancangbangun/> Looks like the real part number is "FIR 3D". When searching by part number, wrap it quotes. This might be something similar to your color organ called a "Disco Lamp". It uses an FIR 3D SCR. <https://lh4.googleusercontent.com/wSrxp_Q_mSt7_CqPeIAkqe0Yn3TcqQY_CvGk3mxyQwkqZh9BnIyu6oM3eUpAHh7vRvZy7pPf86BOtMdnQICRiCXo7uqU_OOnlmhMB4DUI4mYz4mnxrErphlUD9aJdcp7fQ=s412> Ok, I give up. No data sheet. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| Jeff Liebermann <jeffl@cruzio.com>: Jun 26 06:45PM -0700 On Fri, 26 Jun 2020 18:36:10 -0700, Jeff Liebermann <jeffl@cruzio.com> wrote: >Ok, I give up. No data sheet. One more "FIR 3D" SCR, also in Indonesia: <https://indo-ware.com/produk-2968-fir3d.html> The page has fields for the specs, but no numbers are supplied. I get the feeling that nobody knows the specs. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| Chuck <chuck23@dejanews.net>: Jun 27 11:20AM -0500 >Hello. The Zinger is a six light alternating and flashing unit. It could run either on with varied speeds or connected to a speaker wire or radio output to pulse with the music. I am trying to fix this bedraggled old thing ... I know, glutton for punishment. Anyhow, the transistor (which is quite toasted) is a Toshiba FIR3D41. I can find no info online about this part or what the replacement might be. Based on what it is supposed to do, are there any suggestions for a replacement? It is 120v and the model number is 528. Thanks for any info ! NTE5455 should be suitable. |
| bud-- <null@void.com>: Jun 26 01:46PM -0600 On 6/25/2020 11:37 PM, Cydrome Leader wrote: > Wait earlier you said that lower current, lowering watts - "which is a > scam", but now increased current somehow increases power. I'm so lost > here. I thought it was rather obvious. You put a capacitor across a circuit. There is a current through the capacitor. That current does not cause a Wh meter to change. There is circuit wire resistance in series with the capacitor. That cause a voltage drop across the resistance. That voltage drop must necessarily be in phase with the current. That causes power dissipation (heat) which will register on a Wh meter. This will be true for scam boxes that leave a capacitor connected (likely all of them). I think it us unlikely the scam boxes produce significant changes in #1, #2, #3. Selling points I have seen have been on the misconception/lie in my first comment yesterday. > 120 volts. You might only save 10 watts of resistive losess, but might > also be able to not trip a breaker or blow a fuse if other items are on > that branch. The limiting factor on overcurrent protection is likely the starting current of the motor, which can be about 6x the running amps. For motor circuits, because of the starting current, the source overcurrent protection under the NEC can be significantly higher than the wire "ampacity". And as someone wrote, for a "continuous" load (over 3 hours) you are generally limited to using 80% of the overcurrent device rating. And imagine you have a motor on a branch circuit that draws "too many" amps. You connect a capacitor on the branch circuit at the panel that *significantly* corrects the power factor. That does not change the current on the rest of the circuit to the motor, which has not been corrected. |
| bud-- <null@void.com>: Jun 26 01:47PM -0600 > Has anyone here ever actually looked into what utility-grade "capacitor banks" do, why they are installed and where they are installed? > It is pretty simple, and pretty basic. No, they do not exist to 'cheat the meter'. Yes, they do save money, no, they do not save power. How those things happen together is where the 'magic' resides. But it ain't nohow magic. Assume this is about locations, primarily industrial, where the utility meters kVARh. PF correction can save a lot of money (pay for itself) because the utility has a $ignificant "penalty" for kVAR 'use'. If the plant corrects power factor the utility doesn't have to (I see racks of utility PF correction capacitors often). The penalty encourages "magic". If utilities don't correct PF they have added losses from wire resistance (#3 above) and generator capacity is reduced. If a motor is switched off and on the capacitors can be on the motor side of the motor control. I have seen rather large banks of capacitors in large plants. That works when the plant runs full time. I expect they would be automatically or manually disconnected if the plant was to shut down. The most interesting installation used large open frame motors running compressors, which could be unloaded. The motors were synchronous. If over-excited they act as capacitors. Control equipment matched the correction with what was needed. |
| Bo-Lennart <bo-lennart.karlsson@telia.com>: Jun 26 10:25AM -0700 Den fredag 26 juni 2020 kl. 16:11:48 UTC+2 skrev Bo-Lennart: |
| You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com. |
No Response to "Digest for sci.electronics.repair@googlegroups.com - 9 updates in 3 topics"
Post a Comment