Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[TheBoy]

Been playing radios today...

I've found the reason why I have been unable to tech2 the replacement radios and displays.  Thats been bugging me for bloody months.

Radio, that was a missing 0v (even though all functions worked OK) on pin 26.  Wiring diagram had it, so I must have missed it when I made the loom adapter  

Display was also a missing 0v, not on wiring diagrams, so how the hell was I supposed to know that pin 32 needed a 0v on it  

Still, thats a result


Also put the CCR800 back in the tractor, and fixed a monumental fuel leak, which was also causing a awful misfire  

[tunnie]

where was the fuel leak in the end?

[albitz]

Whats an 0v ?

[Marks DTM Calib]

Been playing radios today...

I've found the reason why I have been unable to tech2 the replacement radios and displays.  Thats been bugging me for bloody months.

Radio, that was a missing 0v (even though all functions worked OK) on pin 26.  Wiring diagram had it, so I must have missed it when I made the loom adapter  

Display was also a missing 0v, not on wiring diagrams, so how the hell was I supposed to know that pin 32 needed a 0v on it  
Still, thats a result


Also put the CCR800 back in the tractor, and fixed a monumental fuel leak, which was also causing a awful misfire  

Er, I mentioned that relating to the CIDs and the mode select pin!

[JonArgraig]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

[TheBoy]

Been playing radios today...

I've found the reason why I have been unable to tech2 the replacement radios and displays.  Thats been bugging me for bloody months.

Radio, that was a missing 0v (even though all functions worked OK) on pin 26.  Wiring diagram had it, so I must have missed it when I made the loom adapter  

Display was also a missing 0v, not on wiring diagrams, so how the hell was I supposed to know that pin 32 needed a 0v on it  
Still, thats a result


Also put the CCR800 back in the tractor, and fixed a monumental fuel leak, which was also causing a awful misfire  

Er, I mentioned that relating to the CIDs and the mode select pin!

It was your comment that made me check, though didn't think it would apply to CCRT700 MIDs or GIDs as well. But it does

[albitz]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

Thanks.

[zirk]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

Thanks.

Chassis earth, or a piece of wire going back to your Negative on your Battery.

Blimey takes me back my first Car was Posative Earth and the car was about 30 years old then. That was in the days of positive earth radio's and TV's, seem to remimber Germanium Transistors (PNP) when the world thougt that electrons traveled from positive to negative!  :-?

[Andy B]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

But most people call it an 'earth'  

[Marks DTM Calib]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

Thanks.

Chassis earth, or a piece of wire going back to your Negative on your Battery.

Blimey takes me back my first Car was Posative Earth and the car was about 30 years old then. That was in the days of positive earth radio's and TV's, seem to remimber Germanium Transistors (PNP) when the world thougt that electrons traveled from positive to negative!  :-?

Lol, you can get PNP and NPN germanium transistors as well as the same for SIlicon ones...

As said, no such thing as an earth on a car, the best it can be refered to is a chassis ground and even thats stretching the imagination!

[TheBoy]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

Thanks.

Chassis earth, or a piece of wire going back to your Negative on your Battery.

Blimey takes me back my first Car was Posative Earth and the car was about 30 years old then. That was in the days of positive earth radio's and TV's, seem to remimber Germanium Transistors (PNP) when the world thougt that electrons traveled from positive to negative!  :-?

Lol, you can get PNP and NPN germanium transistors as well as the same for SIlicon ones...

As said, no such thing as an earth on a car, the best it can be refered to is a chassis ground and even thats stretching the imagination!

Its been a while, so I may be wrong, but the very first transistors were PNP only?

As said, been a while - in my heyday, BC108s were about the most popular tranny out there...

[Kevin Wood]

Its been a while, so I may be wrong, but the very first transistors were PNP only?

As said, been a while - in my heyday, BC108s were about the most popular tranny out there...

Used to play with OC45, OC71s, etc. in my childhood <shudder> all pilfered from old radios, etc.

Kevin

[TheBoy]

Its been a while, so I may be wrong, but the very first transistors were PNP only?

As said, been a while - in my heyday, BC108s were about the most popular tranny out there...

Used to play with OC45, OC71s, etc. in my childhood <shudder> all pilfered from old radios, etc.

Kevin

My brother used to work at a well known scales manufacturer, and I always used to pilfer all the bits off faulty boards, even down to 1p resistors.  Trouble is, in those days, was finding out what the bits were

[Marks DTM Calib]

Whats an 0v ?

The earth or negative feed...


I'm so going to get ripped for saying this...

(Car's dont have a true earth as such)

Thanks.

Chassis earth, or a piece of wire going back to your Negative on your Battery.

Blimey takes me back my first Car was Posative Earth and the car was about 30 years old then. That was in the days of positive earth radio's and TV's, seem to remimber Germanium Transistors (PNP) when the world thougt that electrons traveled from positive to negative!  :-?

Lol, you can get PNP and NPN germanium transistors as well as the same for SIlicon ones...

As said, no such thing as an earth on a car, the best it can be refered to is a chassis ground and even thats stretching the imagination!

Its been a while, so I may be wrong, but the very first transistors were PNP only?

As said, been a while - in my heyday, BC108s were about the most popular tranny out there...

The first transistor was PNP........NPN soon arrived when it became a commercial product and elft the labs.

[Kevin Wood]

My brother used to work at a well known scales manufacturer, and I always used to pilfer all the bits off faulty boards, even down to 1p resistors.  Trouble is, in those days, was finding out what the bits were

My Dad did a fair bit of stores-raiding at work on my behalf, and I used to get all the junk they threw out, so perfected the art of desoldering ICs with a blowtorch.

I still remember the look on my poor mum's face when I returned home from school, and then cleared off with her wheelbarrow only to return 15 minutes later with it loaded up with a Tektronix 546. I still have that scope and it still works. Don't make 'em like that any more.

It's so much easier finding data sheets, etc. now we have the internet. A BBC micro and an acoustic modem didn't really cut the mustard, although I did manage to score a set of the RS data books, and a set of TTL data books which were treasured posessions!

Kevin