Supro 1696TN

[DummyLoad]

PRR - that gif looks nice and clean. So I want to make sure I understand you. Since ExpressSCH only exports to .bmp an amended process from what I responded to Sluckey would be?:
1. Export the file to a 200 pixel bitmap image.
2. Open the bitmap image.
3. Save the bitmap image as a .gif file
I just did that with another sch file and it looks very good.

In Express SCH - select print then chose printer "Print to Microsoft PDF" -or- use 3D Paint (assuming you're running Win10/11) import (File - Open) the BMP and then Save As PNG/GIF/JPEG or print to PDF.


--Pete

[bmccowan]

Yes - most recently I've been using that print to pdf. It's actually "Microsoft print to pdf" on the menu. Works fine.

[scstill]

Not meaning any offense, but I wonder if the good advice on how to use and print from an application would be better served in a more appropriate thread. Always seemed odd that this subject was discussed in this amp topic. Since I was new here and the discussion was by more advanced users, I previously kept this to myself.

[martiro7]

Thanks, sLuckey! Guess I was just a chicken - I actually have those links previously bookmarked but was afraid of putting my money down only to end up with the wrong items. Time for me to step up and do it. What would make life perfect would be to locate the hood on the end of the plug like I circled in the attached image.

[sluckey]

Hoods are over-rated...

https://www.ebay.com/itm/115709659883?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D247276%26meid%3Dbd344a16e8274c2687c28211354c699b%26pid%3D101195%26rk%3D1%26rkt%3D12%26sd%3D304472971012%26itm%3D115709659883%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V4V6ItemNrtInQueryAndCassiniVisualRankerAndBertRecall&_trksid=p2047675.c101195.m1851&amdata=cksum%3A115709659883bd344a16e8274c2687c28211354c699b%7Cenc%3AAQAHAAABUBEC%252B8HimpTF6XPanG8lCeF3G6jifrewDlLoKJMPz0RnJH8s%252BUBlIo2cSQSdgSGvSVvCKC6zF4X6tOnQIr392G0gldH8QjhGQ2fmdEokLVFt29UKj%252FEph29NUO0KxqhEb84gZhbKWlWfbravBJF8o5LwNunnlg6y8vB62zish5yQg%252BK90liW1m3KWjd8XrvChe1uo5LO6K7wp%252FJ%252B36Tz9lPJ1gQefkWd4MEeD0gvW45egOGgnisoXyeusRUBMzlL%252Bz3%252BWhwK%252F2tddTYn999lE4A1OswSG4KAIvdZErsLiPZN5nE4gHhBNwJs3zSPxKLo19gr%252BC0FdDdECd6pu%252F3xrVR%252F3V9634HyKh5QhcVmcp6122w1QdR%252FQUhBOB3WV2FagaBfPnI7FewIVQbMYcs4k2hvNHiaPGYTmZcvOY2vCmrPNDPkApVq8ILfQz8NY5W8Ag%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675

[martiro7]

I will give that metal cover a try. Thanks! On a side note, your website shows a Supro 6424 build. Have you ever built a 1696T clone?

[sluckey]

I will give that metal cover a try. Thanks! On a side note, your website shows a Supro 6424 build. Have you ever built a 1696T clone?

I've only built the Supro 6424. But for some reason I have a layout for a 1696TN. I remember drawing it up but don't remember why.

[martiro7]

Well, I for one am Very glad you did draw it up. My intent is to go ahead and split the "Power Pack" from the preamp. I am still dissecting the minor differences between Bill's 1961, Leon's 1964, with some input from Terry Dobb's 1959 Coronado and Eric Kettenburg's Dirty Girl. I am starting with a 1696, but still open to a 1690 build depending on how things shake out. Got the tubes, transformers, and expect to have the passive parts (and plugs/sockets!) in a few weeks. Thanks

[martiro7]

I finally found a hood that appears to match the supro photo I showed earlier. I just can't bring myself to spend $44 on something this simple, so I will be sticking with either a bakelite or metal one (cheap enough I ordered both from eBay). Cheers

[scstill]

After I soldered all the wires to the plug I put the wire bundle in a heat shrink tube.
I got the heat shrink as close to the plug as possible.
Then I pulled flexible electrical tape over the plug to cover the remaining wires (no contacts exposed).
With this approach, I was able to bend the wire 90deg to fit the specific design.
It looks very custom and professional. Used the previously mentioned ebay plug.
Just need to find time and energy to finish the project :-)

[scstill]

Latest pic showing progress
Lower chassis wired, heaters and reverb transformer on upper.
Also the foot switch is showing as well.
Red HV plate wires are not yet connected (spaghetti)

[martiro7]

Looking very good and professional. I never would have guessed electrical tape on the connector if you hadn’t said something. Thanks

[sluckey]

I used a slightly different style plug. The higher profile makes it easy to grab the plug base to insert/remove. Don't remember where I got it. I may have had it for 40 years.   

[scstill]

You are right about the higher profile grab. That Vox5 OT iron is huge.
I just hope that in the years to come my tape doesn't deteriorate.
Haven't thought of anything better yet...
I know that somebody out there has it.

[sluckey]

That amp is not a Vox. It's a fixed bias "November" amp stuffed into a little Vox cab. But that OT is the same as I used in my Vox AC-15 amp.

[bmccowan]

Is this what you want?
https://www.ebay.com/itm/134178867523?hash=item1f3daf0943:g:7BAAAOSwxAJi2cls&amdata=enc%3AAQAHAAAAwGQMx7n8LPKyrAxTdDm2Livo0DY1w%2FNhDyxsK%2Fbu2TKuwA6xTmcVkNNtwaALqHADmedT272G3tFuz%2Ba51SJC23l8ndFMAswrVoisLK8XMLTtBaxXuqXrTMlFZt4RuqP27MmuHua6DD9YaPVtGvzodoPE2vhWZIX6LBZYTkQA6REfrzvmSY0hj1%2FYvj%2B8EEaP4EBYgFwww6EhW1XWyah77PykPqrI2RAs6WS1PS%2BXZs%2FcgOQk%2BagkrT9PH19DPHKSGg%3D%3D%7Ctkp%3ABk9SR4yQ297eYQ

[martiro7]

Yes that's what I'm looking for! But they want another $15 for shipping from Antigua. In the meantime, here is a picture of what I ordered yesterday. If it doesn't work out I will go for the one you shared with me. Thanks!

[martiro7]

I will give that metal cover a try. Thanks! On a side note, your website shows a Supro 6424 build. Have you ever built a 1696T clone?

I've only built the Supro 6424. But for some reason I have a layout for a 1696TN. I remember drawing it up but don't remember why.

First of all, I want to say thanks for your 1696 visio and layout. It is 95% Bill Kahle' 1961 and 5% Leon Chalnick's 1964. Great work! I have attached my own previous drawing of Bill's 1961 (in diylc) with notes comparing mine to yours and Leon's. At this point, I think I will try your schematic since your experience is so much deeper than mine. Also, I have noticed some folks are using shorting input jacks on either the second jacks or occasionally both channel jacks. So in the interest of good sense, I think I will go with shorting. After construction, if the tremolo is too noisy when turned down, I may add a switch. I'm really looking forward to getting all the parts in so I can begin construction!

[Lectroid]

@martiro7,

I'm fascinated by that 'standby' switch on the output of the phase inverter.  How does that work exactly?

[scstill]

That amp is not a Vox. It's a fixed bias "November" amp stuffed into a little Vox cab. But that OT is the same as I used in my Vox AC-15 amp.

Was just using the title of the picture.

[martiro7]

@martiro7,

I'm fascinated by that 'standby' switch on the output of the phase inverter.  How does that work exactly?

To the best of my knowledge (which is slight!) it basically just shorts the power tube inputs  so there is no signal there to amplify, imho.

[sluckey]

@martiro7,

I'm fascinated by that 'standby' switch on the output of the phase inverter.  How does that work exactly?

To the best of my knowledge (which is slight!) it basically just shorts the power tube inputs  so there is no signal there to amplify, imho.

The two signals are 180° out of phase. When you tie them together they cancel each other. If the PI is perfectly balanced, there will be total cancellation. If not perfect, then there will be a little bit of sound left over. The Silvertone 1484 uses this same STBY switch.

[martiro7]

To all you Supro clone builders out there, has anybody implemented a master volume? Since the 1696T has a paraphrase phase inverter, does that mean I should go with a pre PI MV instead of a post PI MV? I stink at figuring out the appropriate resistances so I was hoping to copy somebody else's circuit that actually works.

In the meantime, I took a stab at a post PI MV. I substituted one half of a dual 250K pot for the 270K "upper" half of V2, and a 220k in series with the other half of the dual 250K pot for the 470K "lower" half of V2.

Any thoughts and ideas would be appreciated. thanks!

EDIT... I took my name off this schematic. I did not draw this MV. I think martiro7 should get full credit. Please don't put my name on your drawings... sluckey

[martiro7]

My apologies, I try to give credit to originals I shamelessly work from.