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Test Equipment Anonymous (TEA) group therapy thread

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factory:

--- Quote from: bd139 on June 25, 2022, 10:53:31 am ---
--- Quote from: bd139 on June 25, 2022, 10:24:27 am ---Oh I did it again.  Bought a Tek 465B  :-DD

--- End quote ---

Just seen it has option 007 - DC input. Never had one with DC input before. Interesting.

--- End quote ---

Nice option, will run of 12V to 24V, looking at Tek wiki I hope you got the DC power lead with it.

David

bd139:

--- Quote from: factory on June 25, 2022, 10:59:26 am ---
--- Quote from: bd139 on June 25, 2022, 10:53:31 am ---
--- Quote from: bd139 on June 25, 2022, 10:24:27 am ---Oh I did it again.  Bought a Tek 465B  :-DD

--- End quote ---

Just seen it has option 007 - DC input. Never had one with DC input before. Interesting.

--- End quote ---

Nice option, will run of 12V to 24V, looking at Tek wiki I hope you got the DC power lead with it.

David

--- End quote ---

No DC lead.

Just checked the service manual and it’s just an inverter coupled to the usual AC transformer that runs at 400Hz. I was slightly worried it was a whole different power supply stack up which might be an ass to deal with.

Probably won’t ever fire up the DC option if I’m honest.

Vince:

--- Quote from: capt bullshot on June 25, 2022, 07:28:51 am ---
--- Quote from: Vince on June 24, 2022, 08:44:25 pm ---Got  chip marked 74HCT4060  :o

4060 is 4000 series CMOS of course... and 74HCT is.. well 74 series. Two different things. How can I see both merged into one single part number ! Is it a 4060 or a 74 chip ?!


--- End quote ---

That's an easy one:
4060 function and pinout in HC / HCT technology. So basically it runs off 5V only and faster than the original 4060

--- End quote ---

Oh no I am confused now... as I wrote last night, the datasheet I pulled for that 74HC/T 4060 says that HC and HCT can be supplied from 2V to 6V, not just a fixed 5V ?!  :-//

HCT gives TTL input thresholds but I guess obviously it can only be true if you choose to power the chip at 5V rather than 6V or 2V or 4V or whatever... 


tggzzz:

--- Quote from: bd139 on June 25, 2022, 10:24:27 am ---Oh I did it again.  Bought a Tek 465B  :-DD

--- End quote ---

So, Twickenham<->Chieveley<->Andover tomorrow?

Well, if you need another where the trigger/sweep doesn't work and I CBA'd to look at it...

I'll probably go to Chieveley tomorrow, since it currently looks like it won't be raining. Doubt I'll be selling anything other than pre-orders, though.

capt bullshot:

--- Quote from: Vince on June 25, 2022, 11:09:42 am ---
--- Quote from: capt bullshot on June 25, 2022, 07:28:51 am ---
--- Quote from: Vince on June 24, 2022, 08:44:25 pm ---Got  chip marked 74HCT4060  :o

4060 is 4000 series CMOS of course... and 74HCT is.. well 74 series. Two different things. How can I see both merged into one single part number ! Is it a 4060 or a 74 chip ?!


--- End quote ---

That's an easy one:
4060 function and pinout in HC / HCT technology. So basically it runs off 5V only and faster than the original 4060

--- End quote ---

Oh no I am confused now... as I wrote last night, the datasheet I pulled for that 74HC/T 4060 says that HC and HCT can be supplied from 2V to 6V, not just a fixed 5V ?!  :-//

HCT gives TTL input thresholds but I guess obviously it can only be true if you choose to power the chip at 5V rather than 6V or 2V or 4V or whatever... 


--- End quote ---

Sorry for confusing you more than necessary ...
HC runs from 2 ... 6V, HCT is specified 5V +/- 0.25V or similar but will run from a wider range too. When I was talking of 5V only I was meaning this is a typical 5V logic IC, not their maximum or typical supply range, in contrary to 4000 series which are "12V logic" or "high voltage logic" as a very coarse classification. HC and HCT is just 5V to me, and I'm way too lazy to mention the whole lot of correct supply voltage ranges and their implications when talking about these logic series.

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