- I need datasheet OZ8283LN AND SCHEMATIC SN4SL01 MB REV: 1.3 - 1 Update
- B&K FET-VOM 179, service manual - 5 Updates
- Carvin B2000 bass amp won't power on, need schematic. - 8 Updates
| Michael Terrell <terrell.michael.a@gmail.com>: Sep 22 06:56AM -0700 > I need this a lot. > who can make available to me I have not found. > Thank you in advance. SN was TI's prefix for TTL ICs Are you sure that you aren't looking for SN74SL01 instead of SN4SL01? SN74 was the consumer grade series, while the SN54 series was military grade. |
| Bo-Lennart <bo-lennart.karlsson@telia.com>: Sep 21 09:57AM -0700 måndag 21 september 2020 kl. 16:20:55 UTC+2 skrev Fox's Mercantile: > Jeff-1.0 > WA6FWi > http:foxsmercantile.com Thanks Fox....Yes I have been at theire site. But no luck. I have send them an e-mail, but no reply yet. BTW, I'm also a radio-ham, callsign: SM4JLV. Thanks again for helping me to solve my problem. Thanks. |
| Reinhard Zwirner <reinhard.zwirner@t-online.de>: Sep 21 07:35PM +0200 Bo-Lennart schrieb: > Hi.... I still looking for a service manual för either B&K FET-VOM 179 or KYORITSU FET-VOM K-200. I would like to adjust the instrument in a proper way. I have found some schematic on the net. And it seems that there are at least 2 version of that instrument. As to the Kyoritsu K-200 FET-VOM you can download it here <https://elektrotanya.com/showresult?what=kyoritsu+k-200&kategoria=All&kat2=All> for free. HTH Reinhard |
| Bo-Lennart <bo-lennart.karlsson@telia.com>: Sep 21 11:26AM -0700 måndag 21 september 2020 kl. 19:35:29 UTC+2 skrev Reinhard Zwirner: > for free. > HTH > Reinhard Thank You, Reinhard.... but I have allreafy downloaded those dokument. The document just tell how to operate the instrument. To set the DC-cal and AC-cal is very obviously. But it dosen't say anything how to set the BIAS-control. I have looked at other FET-VOM service manual, there they explain how to set the BIAS. They say that I should take another volt-meter and connect the positive lead to the positive terminal of the movement and the negative test-lead to the minus jack. There I will see a voltage. My voltage is between 0.3 to 0,800 Volt when I turn the BIAS-control from end to end. But at what voltage should I leave the BIAS-control??? That is my question. Thanks anyway for Your reply. Bo-Lennart |
| Fox's Mercantile <jdangus@att.net>: Sep 21 06:29PM -0500 On 9/21/20 11:57 AM, Bo-Lennart wrote: > Thanks Fox....Yes I have been at theire site. But no luck. I have send them an e-mail, but no reply yet. BTW, I'm also a radio-ham, callsign: SM4JLV. Thanks again for helping me to solve my problem. Thanks. I have a B&K Model 400 CRT tester. It not on any of the usual places you find a manual. I sent a query to B&K and they said that unfortunately they did not have that specific manual. It was via email and it took a day or two for them to get back to me. Id did some searching and found the manual for sale on web site. I sent a message to the owner that I was interested. I paid for the manual and he sent me a few other things elated to it. Then I sat down with my scanner and put it all into 3-4 pdf files. One, of course, got uploaded to BAMA. Another copy got sent to B&K, "And now you DO have a copy of the manual." -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
| Bo-Lennart <bo-lennart.karlsson@telia.com>: Sep 22 01:54AM -0700 tisdag 22 september 2020 kl. 01:29:31 UTC+2 skrev Fox's Mercantile: > Jeff-1.0 > WA6FWi > http:foxsmercantile.com Hi again Fox.... Nice thing You did there. I've start thinking, that there is no service-manual of those two FET-VOM-instrument. If I make a search for a service-manual, it always pop-up Operating Manual. But thats not an service-manual. It includes a schematic, OK, but if there is controls that are not mentioned how to set, it's not a service manual. It seems that I'm searching for something that not exsist. But I will not give up. I'm like You. Thanks again Bo-Lennart |
| David Farber <farberbear.unspam@aol.com>: Sep 21 09:56AM -0700 On 9/20/2020 10:40 PM, Phil Allison wrote: >> voltage and current rating those contacts need to be? > ** 20A at 120VAC at least. > .... Phil Hi Phil, I've found what I think is a partial schematic for this model which I've added to my Carvin folder here: https://app.box.com/s/ch670hnsrtoswqhebtrye95n2vw5ktre Thanks for your reply. -- David Farber Los Osos, CA |
| David Farber <farberbear.unspam@aol.com>: Sep 21 09:57AM -0700 On 9/21/2020 8:34 AM, legg wrote: > contact position, then place a large sticker on > the back indicating "100-130VAC INPUT ONLY". > RL What an ingenious workaround! I'll definitely check out that relay swap option. By the way, the user informed me the model was not purchased in 2000. It was purchased in 2009. There is a schematic for that year but it looks incomplete to me. I've uploaded it to: https://app.box.com/s/ch670hnsrtoswqhebtrye95n2vw5ktre Thanks for your reply. -- David Farber Los Osos, CA |
| legg <legg@nospam.magma.ca>: Sep 21 02:13PM -0400 On Mon, 21 Sep 2020 09:57:39 -0700, David Farber >incomplete to me. I've uploaded it to: >https://app.box.com/s/ch670hnsrtoswqhebtrye95n2vw5ktre >Thanks for your reply. Unfortunately, this doesn't cover the power section. RL |
| legg <legg@nospam.magma.ca>: Sep 21 03:00PM -0400 On Mon, 21 Sep 2020 09:57:39 -0700, David Farber >incomplete to me. I've uploaded it to: >https://app.box.com/s/ch670hnsrtoswqhebtrye95n2vw5ktre >Thanks for your reply. The following schematic covers models: DCM1540L DCM2000L DCM3000L DCM3800L B2000 Rev J https://cdn.shopify.com/s/files/1/0476/5297/files/30-02050revj.pdf?2645 It has a line input and power stage looks similar to the one you're fooling with, but I don't see a tube section inserted anywhere. You can wade through other Carvin docs: https://carvinaudio.com/pages/power-amplifier-schematic The older B2000 had a 60Hz transformer power supply, unlike your unit. RL |
| Phil Allison <pallison49@gmail.com>: Sep 21 03:57PM -0700 Phil Allison wrote: =================== > The blown device is a PTC thermistor ** Of course that should be an * NTC thermistor*. https://passive-components.eu/how-to-use-ntc-thermistors-for-inrush-current-limiting/ ..... Phil |
| David Farber <farberbear.unspam@aol.com>: Sep 21 08:44PM -0700 On 9/21/2020 3:57 PM, Phil Allison wrote: > ** Of course that should be an * NTC thermistor*. > https://passive-components.eu/how-to-use-ntc-thermistors-for-inrush-current-limiting/ > ..... Phil I found this NTC-5D11 on eBay. https://www.ebay.com/itm/141513042814 The datasheet says it's 5 ohms, continuous current 4 amps, and 0.0156 ohms at max current. I still need to check the circuit first to make sure there is no overload. Thanks for your reply. -- David Farber Los Osos, CA |
| David Farber <farberbear.unspam@aol.com>: Sep 21 08:55PM -0700 On 9/21/2020 12:00 PM, legg wrote: > The older B2000 had a 60Hz transformer power supply, unlike > your unit. > RL That's a great find. I wonder if the schematic I found earlier in my research, https://cdn.shopify.com/s/files/1/0476/5297/files/80-42000revd25feb10.pdf?2161 interconnects with this new one you found. Thanks for your reply. -- David Farber Los Osos, CA |
| Phil Allison <pallison49@gmail.com>: Sep 21 11:20PM -0700 David Farber wrote: ================= > https://www.ebay.com/itm/141513042814 > The datasheet says it's 5 ohms, continuous current 4 amps, and 0.0156 > ohms at max current. ** Way to much to pay for shipping. Newark has the same for 50 cents each. > I still need to check the circuit first to make sure there is no overload. ** The original NTC may be way higher in value than 5 ohms - up to 50 ohms maybe. I gave that number for tests using a Variac only. .... Phil |
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