View previous topic :: View next topic |
Author |
Message |
Musicman
Joined: 23 Jun 2019 Posts: 7
|
Link Posted: Fri Jul 05, 2019 12:05 am Post subject: Tube Swap |
|
|
Can 07MSP TUBE SWAP FOR A 07MP or will the power block on a 1252Q work on a 1251Q?
|
|
Back to top |
|
|
Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
|
Link Posted: Fri Jul 05, 2019 12:18 am Post subject: |
|
|
Maybe. Physically the tubes are the same, but the focus voltage is different. you may need to modify the 5Kv focus circuit, but sometimes the focus control will have enough range to bring it into focus. Usually right at the end of the range of the pot. You won't know until you try.
|
|
Back to top |
|
|
Musicman
Joined: 23 Jun 2019 Posts: 7
|
Link Posted: Fri Jul 05, 2019 12:36 am Post subject: |
|
|
Any thoughts on whether the power block will interchange.
|
|
Back to top |
|
|
Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
|
Link Posted: Fri Jul 05, 2019 1:55 am Post subject: |
|
|
What do you mean by power block? Not sure if the focus voltage shift is in the HV transformer unit, or if the focus/screen control is different. But yes, they will interchange, assuming you're swapping all 3 tubes at the same time. If you're only changing one, then you have to mix and match, and play with the focus settings.
|
|
Back to top |
|
|
Musicman
Joined: 23 Jun 2019 Posts: 7
|
Link Posted: Fri Jul 05, 2019 2:42 am Post subject: |
|
|
Thanks for your response. By power block (as identified in the manual) I meant the large block of Electronics located directly under the three lenses which slides in and out to give you access. That is irrelevant now though since I did as you suggested and changed the tube out. It performed exactly as you said it would. I had to turn the blue focus pot to the limit of its range to get it to be in focus. The focus is not like the original tube but it works. Thanks for your help. It was a learning experience.
|
|
Back to top |
|
|
Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24301 Location: Langley, BC
TV/Projector: All of them!
|
Link Posted: Fri Jul 05, 2019 2:47 am Post subject: |
|
|
Oh and no, the power supply block will not interchange between the two.
|
|
Back to top |
|
|
|
|