For Sale: Amplifone High Voltage Bare PCBs for Atari XY Color Vectors

[dezbaz]

An Amplifone problems and solutions thread has been started (Troubleshooting) if anyone is interested

http://forums.arcade-museum.com/showthread.php?t=350683

 

[dezbaz]

Hi Guys.

A well known KLOVer and repairer has brought it to my attention that one of the diodes needs to be upgraded.

He directed me to this link
http://www.vectorlist.org/Vectorlist/2000/03/0102.html
Have a quick read

In the case of an Amplifone HV board, it's diode CR8 (An optional diode)

In the case of a PAT9000 board, it's diode CR48 (Also optional)

We were fitting a 1N4002 diode, as that was what was fitted on one of my HV boards many years ago.

However the WG6100 uses a 1KV diode in the same place. IE: D902

So if you are using a BU406 Transistor (As opposed to a BU406D) and are fitting this optional diode, use this diode externally to the BU406

http://www.newark.com/on-semiconductor/mur2100eg/fast-recovery-diode-2a-1kv-axial/dp/42K1616

The Part Number is MUR2100EG

If you only use BU406D transistors, ignore this post

Parts lists have been updated (Amp HV and PAT9000)

This diode may do the same thing, but is really cheap.
The MUR2100EG is really dear

http://au.element14.com/multicomp/uf2008/fast-recovery-diode-2a-1kv-do/dp/1861502

 

[bakerhillpins]

FYI:
Working 3 different rebuilds at the moment and realized that I had ordered incorrectly for my Amplifone HV rebuild because I used dezbaz's parts list to help ID parts... Specifically:


The Amplifone HV Part's list on @dezbaz 's site is listing the incorrect part (1N4001) for CR8!


If you go back through this thread you will see an older schematic revision that calls out a 1N400x part. The Schematic dated 18 July 2015 is listing the correct MUR2100EG part!

Also note that Bill's WG6100 Color Vector Monitor Rebuild Kit has a typo in the part# and the link is dead:


I started at Bill's page to rebuild mine and I ended up pulling a part that's not spec'ed the same as the MUR. So even though my monitors work, I'm ordering the MURxx part and replacing the one I chose.

 

[dezbaz]

The Amplifone HV Part's list on @dezbaz 's site is listing the incorrect part (1N4001) for CR8!
View attachment 475384

This is now fixed
Here

Thanks for reporting the error

Regards Dez

 

[bakerhillpins]

Thanks for reporting the error

Regards Dez

No problem.. Thanks for putting the BOM together. It saved me tons of time!!!

 

[komodo]

I could be wrong but the copy of the schematic for version 4 of the amplifoneHV also has the 1N4001 listed

 

[bakerhillpins]

I could be wrong but the copy of the schematic for version 4 of the amplifoneHV also has the 1N4001 listed

Version 4 HV Schematics show the correct part? Can you provide a link to the one you see with the error.

 

[komodo]

I may have printed it before it was changed. That's why I offered the disclaimer. I have it bound in a book of amplifone articles etc.

 

[bakerhillpins]

I've got 2 Amplifone deflection boards, rebuilding one now. On the 1st to be rebuilt the Y amp section was blown out at one time taking a LOT of components with it (repaired before I got it). So I decided to clean it up by ordering all new components and replacing the messy looking stuff that the previous repair tech put in.

Working through rebuild I noticed the following inconsistencies and wondered if anyone had any specific insight.

R12/35 are listed in @dezbaz's parts list as 15 ohm 0.25w resistors...


The Amplifone manual lists 2 different values:
On page 28 it shows pictorial values of 15 ohms for each of them:



But the parts list on the next page has 10 ohms listed:


Both of the Amplifone deflection boards that I have contain 10 ohm resistors in both the R12/35 locations. Anyone have a comment on the correctness of the 15 ohm part and if using it causes any issues? I'm leaning twards stuffing with 10 ohms as that's what was there.

Oddly enough the pictorial image of R7/30 is either 10k ohms or 10 ohms respectively... so that's a bit outside the values listed ... lol



Anyone build up a Amplifone Deflection from scratch and use the 15 ohm parts?

BTW - there are errors all over the place in that manual (1st printing). C3/13 are mixed up in the same way as the resistors I mention above.

 

[bakerhillpins]

While I'm in here, can someone comment on the resistance value of the degaussing coil on the 19" tube? Part# A201107-01.

 

[dezbaz]

I've got 2 Amplifone deflection boards, rebuilding one now. On the 1st to be rebuilt the Y amp section was blown out at one time taking a LOT of components with it (repaired before I got it). So I decided to clean it up by ordering all new components and replacing the messy looking stuff that the previous repair tech put in.

Working through rebuild I noticed the following inconsistencies and wondered if anyone had any specific insight.

R12/35 are listed in @dezbaz's parts list as 15 ohm 0.25w resistors...
View attachment 509730

The Amplifone manual lists 2 different values:
On page 28 it shows pictorial values of 15 ohms for each of them:
View attachment 509733
View attachment 509732

But the parts list on the next page has 10 ohms listed:
View attachment 509734

Both of the Amplifone deflection boards that I have contain 10 ohm resistors in both the R12/35 locations. Anyone have a comment on the correctness of the 15 ohm part and if using it causes any issues? I'm leaning twards stuffing with 10 ohms as that's what was there.

Oddly enough the pictorial image of R7/30 is either 10k ohms or 10 ohms respectively... so that's a bit outside the values listed ... lol
View attachment 509738
View attachment 509739

Anyone build up a Amplifone Deflection from scratch and use the 15 ohm parts?

BTW - there are errors all over the place in that manual (1st printing). C3/13 are mixed up in the same way as the resistors I mention above.

Thanks for pointing this out
The parts list is correct (EDIT 15Ω. That doesn't mean the 10Ω isn't

Both have been known to be fitted. Both work

My boards mainly had 15Ω, so I went with 15Ω. EDITED
In all cases where there was a dependency, I went with what I found in boards. My green board had 15Ω x2
It's just a biasing resistor to the base of a tranny.
It's not critical

The caps, I went with 0.47 uF for the same reasons.
I have no bad feedback using these values after all this time

The degauss (Someone else may be able to help) my 19" SW is locked in

 

[bakerhillpins]

The parts list is correct (10Ω. That doesn't mean the 15Ω isn't

I think you've got a typo in there... the Parts list you link to has 15 not 10 ohms. Unless I'm not reading you correctly.

But either way, your point is that both 10/15 ohms have been seen stuffed in boards and both work. Thanks!

 

[dezbaz]

I meant 15 is correct
The typo was in the above post

I will also amend my diagram