Re: Identifying TO-3 w/HP house numbering
Josh Dersch via cctalk wrote: > On Tue, Oct 16, 2018 at 11:19 AM Josh Dersch wrote: > > > Thanks, all, for the responses! The way it measures out makes it look > > like it may be an MJ10006 or similar. I think it's probably ok. > > > > I poked around a bit more this morning and it's looking like part of the > > flyback is shorted out -- we have a 2382 at the museum and I popped it open > > just now and I verified that it measures differently (i.e "not shorted" :)) > > at the same points. So that's likely my problem. Drat. > > > > - Josh > > > > And I was wrong -- the flyback's fine (yay!). Found a nearby 0.015uF, 400V > film capacitor that was shorted. Replaced it and now I have video! It's a > bit dim, it's too wide, and gets wider as it warms up but it's a start :). > > Thanks again, > Josh Sure? It sounds not like a start, it sounds more like the finish..or the end of the flyback transformer. The symptoms you describe, to weide and dull image .getting wider while warmup are those from a dead transformer. Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Straße 42, 09600 Oberschöna, USt-Id: DE253710583 i...@tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741
Re: Identifying TO-3 w/HP house numbering
Josh - You may want to contact Denis Kohlhagen, at Butler Winding. IF this is for the preservation of an HP terminal in the museum, they may wish to assist in rebuild/rewinding that flyback. There are US firms that can perform this work, and publicity of preserving history is desired by some corporate marketing dept. Butler Winding 7426A Tanner Parkway; Arcade, NY 14009 USA http://www.butlerwinding.com/ Phone: 1-716-532-2234 Fax: 1-716-523-2702 == “I poked around a bit more this morning and it's looking like part of the flyback is shorted out -- we have a 2382 at the museum and I popped it open just now and I verified that it measures differently (i.e "not shorted" :)) at the same points. So that's likely my problem. Drat. - Josh” Sent from iPad Air
Re: Identifying TO-3 w/HP house numbering
Yay! Congrats Josh! Marc > On Oct 16, 2018, at 8:39 PM, Josh Dersch via cctalk > wrote: > >> On Tue, Oct 16, 2018 at 11:19 AM Josh Dersch wrote: >> >> Thanks, all, for the responses! The way it measures out makes it look >> like it may be an MJ10006 or similar. I think it's probably ok. >> >> I poked around a bit more this morning and it's looking like part of the >> flyback is shorted out -- we have a 2382 at the museum and I popped it open >> just now and I verified that it measures differently (i.e "not shorted" :)) >> at the same points. So that's likely my problem. Drat. >> >> - Josh >> > > And I was wrong -- the flyback's fine (yay!). Found a nearby 0.015uF, 400V > film capacitor that was shorted. Replaced it and now I have video! It's a > bit dim, it's too wide, and gets wider as it warms up but it's a start :). > > Thanks again, > Josh
Re: Identifying TO-3 w/HP house numbering
On Wed, Oct 17, 2018 at 9:33 AM Josh Dersch via cctalk wrote: > And I was wrong -- the flyback's fine (yay!). Found a nearby 0.015uF, 400V > film capacitor that was shorted. Replaced it and now I have video! It's a > bit dim, it's too wide, and gets wider as it warms up but it's a start :). That suggests to me that what we call the 'EHT' over here -- the 12kV-15kV on the final anode of the CRT -- is low and is sagging under load. Low EHT will cause a dim picture, it will also cause the electron beam to be less 'stiff' (as the electrons are not moving as fast) so the deflection coils have a greater effect and the picture is larger. Possibly more capacitor trouble in the flyback area. -tony
Re: Identifying TO-3 w/HP house numbering
On Tue, Oct 16, 2018 at 11:19 AM Josh Dersch wrote: > Thanks, all, for the responses! The way it measures out makes it look > like it may be an MJ10006 or similar. I think it's probably ok. > > I poked around a bit more this morning and it's looking like part of the > flyback is shorted out -- we have a 2382 at the museum and I popped it open > just now and I verified that it measures differently (i.e "not shorted" :)) > at the same points. So that's likely my problem. Drat. > > - Josh > And I was wrong -- the flyback's fine (yay!). Found a nearby 0.015uF, 400V film capacitor that was shorted. Replaced it and now I have video! It's a bit dim, it's too wide, and gets wider as it warms up but it's a start :). Thanks again, Josh
Re: Identifying TO-3 w/HP house numbering
Thanks, all, for the responses! The way it measures out makes it look like it may be an MJ10006 or similar. I think it's probably ok. I poked around a bit more this morning and it's looking like part of the flyback is shorted out -- we have a 2382 at the museum and I popped it open just now and I verified that it measures differently (i.e "not shorted" :)) at the same points. So that's likely my problem. Drat. - Josh On Tue, Oct 16, 2018 at 3:34 AM David Collins wrote: > The 9816 uses a BUZ45 - might be the same as the 2382? > > David Collins > +61 424 785 131 > > > On 16 Oct 2018, at 3:24 pm, Curious Marc via cctech < > cct...@classiccmp.org> wrote: > > > > Forgot to mention, I have a 2382A that works (affectionately known as > the "Munchkin" terminal). I could measure some stuff in mine for comparison > if that could help out. > > For the HP curious, the 2382A makes an appearance at the end of one of > my videos: > > https://youtu.be/GLkhcDAOVPo?t=19m50 > > It is very cute (I think) ;-) > > Marc > > > >> On Oct 16, 2018, at 12:08 AM, Curious Marc > wrote: > >> > >> Can't find it either in any of the X-ref lists I have. As you know > already, 1854 are usually NPN transistors, but around these numbers I see > mostly Darlingtons in my collection. So maybe that's what you have, and why > the junctions would test weird. > >> Marc > >> > >>> On Oct 15, 2018, at 10:21 PM, Josh Dersch via cctalk < > cctalk@classiccmp.org> wrote: > >>> > >>> Hey all -- > >>> > >>> Got an HP 2382A terminal I'm attempting to resurrect. I get no video, > no > >>> heater, no high voltage. What I believe to be the horizontal output > >>> transistor appears to be bad, but I'm not sure if this thing contains > >>> internal diodes that might be throwing off my testing attempts. It's > >>> labeled "1854-0900." Anyone know what this actually is? (Anyone have > a > >>> service manual for this terminal?) > >>> > >>> Thanks, > >>> Josh >
Re: Identifying TO-3 w/HP house numbering
The 9816 uses a BUZ45 - might be the same as the 2382? David Collins +61 424 785 131 > On 16 Oct 2018, at 3:24 pm, Curious Marc via cctech > wrote: > > Forgot to mention, I have a 2382A that works (affectionately known as the > "Munchkin" terminal). I could measure some stuff in mine for comparison if > that could help out. > For the HP curious, the 2382A makes an appearance at the end of one of my > videos: > https://youtu.be/GLkhcDAOVPo?t=19m50 > It is very cute (I think) ;-) > Marc > >> On Oct 16, 2018, at 12:08 AM, Curious Marc wrote: >> >> Can't find it either in any of the X-ref lists I have. As you know already, >> 1854 are usually NPN transistors, but around these numbers I see mostly >> Darlingtons in my collection. So maybe that's what you have, and why the >> junctions would test weird. >> Marc >> >>> On Oct 15, 2018, at 10:21 PM, Josh Dersch via cctalk >>> wrote: >>> >>> Hey all -- >>> >>> Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no >>> heater, no high voltage. What I believe to be the horizontal output >>> transistor appears to be bad, but I'm not sure if this thing contains >>> internal diodes that might be throwing off my testing attempts. It's >>> labeled "1854-0900." Anyone know what this actually is? (Anyone have a >>> service manual for this terminal?) >>> >>> Thanks, >>> Josh
Re: Identifying TO-3 w/HP house numbering
On Mon, 15 Oct 2018, Josh Dersch wrote: Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no heater, no high voltage. What I believe to be the horizontal output transistor appears to be bad, but I'm not sure if this thing contains internal diodes that might be throwing off my testing attempts. It's labeled "1854-0900." Anyone know what this actually is? (Anyone have a service manual for this terminal?) It's possible that the video section is identical to that of the HP 120. According to Tony Duell's schematics, the HOT is a MJ10006. The HP9816, also similar in shape, uses a BUZ45. The HP150 uses HP part number "1854-0948" which is also a MJ10006. Christian
Re: Identifying TO-3 w/HP house numbering
Forgot to mention, I have a 2382A that works (affectionately known as the "Munchkin" terminal). I could measure some stuff in mine for comparison if that could help out. For the HP curious, the 2382A makes an appearance at the end of one of my videos: https://youtu.be/GLkhcDAOVPo?t=19m50 It is very cute (I think) ;-) Marc > On Oct 16, 2018, at 12:08 AM, Curious Marc wrote: > > Can't find it either in any of the X-ref lists I have. As you know already, > 1854 are usually NPN transistors, but around these numbers I see mostly > Darlingtons in my collection. So maybe that's what you have, and why the > junctions would test weird. > Marc > >> On Oct 15, 2018, at 10:21 PM, Josh Dersch via cctalk >> wrote: >> >> Hey all -- >> >> Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no >> heater, no high voltage. What I believe to be the horizontal output >> transistor appears to be bad, but I'm not sure if this thing contains >> internal diodes that might be throwing off my testing attempts. It's >> labeled "1854-0900." Anyone know what this actually is? (Anyone have a >> service manual for this terminal?) >> >> Thanks, >> Josh
Re: Identifying TO-3 w/HP house numbering
Can't find it either in any of the X-ref lists I have. As you know already, 1854 are usually NPN transistors, but around these numbers I see mostly Darlingtons in my collection. So maybe that's what you have, and why the junctions would test weird. Marc > On Oct 15, 2018, at 10:21 PM, Josh Dersch via cctalk > wrote: > > Hey all -- > > Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no > heater, no high voltage. What I believe to be the horizontal output > transistor appears to be bad, but I'm not sure if this thing contains > internal diodes that might be throwing off my testing attempts. It's > labeled "1854-0900." Anyone know what this actually is? (Anyone have a > service manual for this terminal?) > > Thanks, > Josh
Identifying TO-3 w/HP house numbering
Hey all -- Got an HP 2382A terminal I'm attempting to resurrect. I get no video, no heater, no high voltage. What I believe to be the horizontal output transistor appears to be bad, but I'm not sure if this thing contains internal diodes that might be throwing off my testing attempts. It's labeled "1854-0900." Anyone know what this actually is? (Anyone have a service manual for this terminal?) Thanks, Josh
