Jump to content

Recommended Posts

  • Replies 370
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Just like Carbon we built. Same box, same PS. Relay=120s. Separated filament transformer.      

Another Grounded Grid lives.  Have been listening to it for about a week. Powered by the same GRHV/GRLV PSU I use to power my KGSSHV, Carbon and Blue Hawaii. 400VDC rails and 20mA plate current.

Posted Images

If you use GRHV supplies with “switch” – there are all kinds of supplies now days – it’s fairly easy to arrange a delay, even with a flashing led during pre-heat and steady in operation mode.

Link to post
Share on other sites
  • 2 weeks later...
On 3/19/2017 at 2:01 AM, joehpj said:

Semi-customized. The shape of front plate, depth, height, and heatsink was fixed. Others were customized.

I assume these cases are from China? Any hint as to who/where they are from?

Everytime I see one of your pics, I keep thinking I like those... :)

Link to post
Share on other sites
On 2017/3/31 at 0:51 PM, Pars said:

I assume these cases are from China? Any hint as to who/where they are from?

Everytime I see one of your pics, I keep thinking I like those... :)

Those are indeed from China. I have some spare.......so PM me for detail if you are interested :)

Link to post
Share on other sites

I'm building it with +-450V supplies.

Still a bit afraid of the possible short between B- connection and the feedback trace, like it happened to insanity's Carbon.

Edited by G600
precisions
Link to post
Share on other sites

Not built, still waiting for the custom transformer, and a bigger issue is the lack of a drill press and the related skills.

Still being a very young padawan in DIY. Need some more weeks before completion.

Edited by G600
Link to post
Share on other sites
7 hours ago, G600 said:

Not built, still waiting for the custom transformer, and a bigger issue is the lack of a drill press and the related skills.

Still being a very young padawan in DIY. Need some more weeks before completion.

Yes, I´m waiting for two trafos too.

TS300VA PRI: 230V

> 2x360V @350mA

> 18-0-18V @600mA

And:

TS50VA PRI: 230V SEC:

> 6,3V @8A

 

I don´t think that you have problems again if you use the "top" board (tube side) for put the conector.

Link to post
Share on other sites
12 minutes ago, G600 said:

Drill press madness...

 

are the 10m90 at the BIAS/PSU mounted using insulation washers - doesn't look like ?
Can see you are using nylon for those at the amp board ;o)

Link to post
Share on other sites

For sure !

I use the RENY screws I have left from the T2, with spring washers over standard washers. Outstanding stuff from Chemis.

The steel screw you can see just holds the board in place.

Edited by G600
Link to post
Share on other sites

Received the transformer today.

Didn't imagine such a big boy. But perfectly built.

Changing plans for casing, unless it won't fit.

Despite some mistakes and need of adjustment (make the tubes symmetrical for sure), you get the idea : 

mini_170412112932328853.jpgmini_170412112932769388.jpgmini_170412112933260217.jpg

Edited by G600
Link to post
Share on other sites
7 hours ago, G600 said:

Received the transformer today.

Didn't imagine such a big boy. But perfectly built.

Changing plans for casing, unless it won't fit.

Despite some mistakes and need of adjustment (make the tubes symmetrical for sure), you get the idea : 

mini_170412112932328853.jpgmini_170412112932769388.jpgmini_170412112933260217.jpg

Enormouse size! Very interesting, what it is dimensions and weight ...

Link to post
Share on other sites

Nice work G600 I can not see the tag of your trafo but I have one question: EL34 uses 6.3vol @ 1.5A, if you use four EL34= 6.3vol @ 6A.

Your trafo only have 4.5A current so I understand that your transformer goes very low in amperage.

 

Edit: Sorry, it´s 2x 6.3volt @ 4.5A

Edited by jose
Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...