That makes me think of an old slogan, and mutate it to "WWBOFH do?"
Telequipment D32
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Use tags for the type of equipment your topic is about. Include the "repairs" tag, too, when appropriate. If a new tag is needed, request one in the TEAdministration forum.
Use tags for the type of equipment your topic is about. Include the "repairs" tag, too, when appropriate. If a new tag is needed, request one in the TEAdministration forum.
Re: Telequipment D32
Ok minor update. Mostly thinking. I looked at power options because quite frankly replacing the NiCd cells is a no. Options considered were:
1. Replace with NiMh. Discarded due to cost.
2. Replace with power bank and USB-C. Discarded due to cost, complexity and safety.
3. Run on external DC power only. Urgh just no.
4. 8V SLA. Discarded as requires mechanical and electrical work.
5. Convert existing charger into 7.5V series regulator. Bingo.
So I did some scribbling and I can remove about 8 components from the HV board and reuse the charge transistor for this. Add three new resistors and a TL431 as a reference and job done. I will order the bits tomorrow which total about £2. This is still only a little more than 10% of what I paid for the scope so border line acceptable
This is similar to the battery eliminator circuit mods I did on Fluke DMMs.
1. Replace with NiMh. Discarded due to cost.
2. Replace with power bank and USB-C. Discarded due to cost, complexity and safety.
3. Run on external DC power only. Urgh just no.
4. 8V SLA. Discarded as requires mechanical and electrical work.
5. Convert existing charger into 7.5V series regulator. Bingo.
So I did some scribbling and I can remove about 8 components from the HV board and reuse the charge transistor for this. Add three new resistors and a TL431 as a reference and job done. I will order the bits tomorrow which total about £2. This is still only a little more than 10% of what I paid for the scope so border line acceptable
This is similar to the battery eliminator circuit mods I did on Fluke DMMs.