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 Post subject: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Mon 19, 2021 9:49 pm 
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I'm trying to restore a Wireless Specialty Triode Type B amp (early model, no jacks) and I'm looking for a wiring drawing or photos of the chassis and wiring. Any help would be greatly appreciated.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Tue 20, 2021 5:22 pm 
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Location: Keystone Heights, FL, USA 32656
I am guessing you have looked at the ones on RM? Post a couple of photos of yours.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Tue 20, 2021 5:33 pm 
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The one on RM with chassis photos is a later model with jacks. I'm looking for photos of the earlier model without jacks. I'll take some photos later.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Tue 20, 2021 6:39 pm 
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Have you tried looking in Worthpoint?. It's becoming a great source for reference information.

https://www.worthpoint.com/inventory/se ... +Specialty

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 12:03 am 
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Here's what I'm starting with, I have two transformers to install. I'll make a sketch of where each of the eight transformer connections come from, then I need to figure out where they go to. Once I have that I can start replacing the existing mix of wiring with square wiring.

Attachment:
SAM_3923.JPG
SAM_3923.JPG [ 764.19 KiB | Viewed 2579 times ]

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Last edited by atwaterkent1 on Aug Sat 21, 2021 8:58 pm, edited 1 time in total.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 12:43 am 
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Location: Keystone Heights, FL, USA 32656
Zoom out so we can see the tube sockets. Need a photo of the front panel. Looks like a version with jacks, all missing.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 12:58 am 
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Is the one shown in October 1919 "Radio News" (page 161) the correct one?

https://www.americanradiohistory.com/Ar ... 919-10.pdf

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 2:07 am 
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Yes, that's the one Bob. No jacks, no jack IDs in the faceplate. There are three plugged holes (not in the right position for factory). Someone added jacks and they were later removed? Unknown.

Attachment:
SAM_3920.JPG
SAM_3920.JPG [ 745.39 KiB | Viewed 2556 times ]


Attachment:
SAM_3925.JPG
SAM_3925.JPG [ 631.61 KiB | Viewed 2555 times ]

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 5:29 pm 
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OK, got it. I think this is a later version of this one on RM, https://www.radiomuseum.org/r/wirelesss ... e_t_2.html.
Your panel is marked for a C battery and 90 to 120 B volts, not 6 volts and 40 volts.

I added what I think are the connections to your photo. Some are marked with (?) because I can't see for sure where on the tube socket the wires go.
Attachment:
Untitled.jpeg
Untitled.jpeg [ 667.43 KiB | Viewed 2502 times ]

I am pretty sure that none of the buss wiring or that aluminum panel are original to the amp. I think the original transformers were mounted to the panel with 4 fasteners each.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 5:56 pm 
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Location: Boston, Massachusetts
jrehkopf wrote:
OK, got it. I think this is a later version of this one on RM, https://www.radiomuseum.org/r/wirelesss ... e_t_2.html.
Your panel is marked for a C battery and 90 to 120 B volts, not 6 volts and 40 volts.

I added what I think are the connections to your photo. Some are marked with (?) because I can't see for sure where on the tube socket the wires go.
Attachment:
Untitled.jpeg

I am pretty sure that none of the buss wiring or that aluminum panel are original to the amp. I think the original transformers were mounted to the panel with 4 fasteners each.


I agree, lots of filled holes in that panel.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Wed 21, 2021 8:21 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Boston, Massachusetts
Looks like it was pieced together, radio museum has a different tube island

Image

shows the guts of the amp.

Image

Ebay has a FADA tube island which looks similar: https://www.ebay.com/itm/373647370718?h ... Swqy5g7KIg

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 12:01 am 
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Location: Washington
A paper copy of the October 1919 "Radio News" might show more details of the back side of the amp (Fig. 2.) I looked though my magazines, but mine only go back to 1920.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 12:25 am 
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mrx wrote:
jrehkopf wrote:
OK, got it. I think this is a later version of this one on RM, https://www.radiomuseum.org/r/wirelesss ... e_t_2.html.
Your panel is marked for a C battery and 90 to 120 B volts, not 6 volts and 40 volts.

I added what I think are the connections to your photo. Some are marked with (?) because I can't see for sure where on the tube socket the wires go.
Attachment:
Untitled.jpeg

I am pretty sure that none of the buss wiring or that aluminum panel are original to the amp. I think the original transformers were mounted to the panel with 4 fasteners each.


I agree, lots of filled holes in that panel.


Just the three.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 12:49 am 
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Joined: May Sat 30, 2015 11:49 pm
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Location: Keystone Heights, FL, USA 32656
The only extra holes are the three large plugged holes. The different tube platform would make sense with the update for the C battery, maybe for 201 tubes instead of the earlier Morehead tubes.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 12:51 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3921
Location: Boston, Massachusetts
atwaterkent1 wrote:
mrx wrote:
jrehkopf wrote:
OK, got it. I think this is a later version of this one on RM, https://www.radiomuseum.org/r/wirelesss ... e_t_2.html.
Your panel is marked for a C battery and 90 to 120 B volts, not 6 volts and 40 volts.

I added what I think are the connections to your photo. Some are marked with (?) because I can't see for sure where on the tube socket the wires go.
Attachment:
Untitled.jpeg

I am pretty sure that none of the buss wiring or that aluminum panel are original to the amp. I think the original transformers were mounted to the panel with 4 fasteners each.


I agree, lots of filled holes in that panel.


Just the three.


Had to magnify the front, so I could see that they were actually screws :(

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 2:08 am 
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Location: Plymouth, MI
Removed the old wiring and positioned transformers. I'd like to see If I can do a better job of plugging the holes in the faceplate before I go any further. Best way to do it?

Attachment:
SAM_3927.JPG
SAM_3927.JPG [ 803.72 KiB | Viewed 2447 times ]

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Dan

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 1:38 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Boston, Massachusetts
atwaterkent1 wrote:
Removed the old wiring and positioned transformers. I'd like to see If I can do a better job of plugging the holes in the faceplate before I go any further. Best way to do it?

Attachment:
SAM_3927.JPG


Those transformers you got from me fit right in.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 6:25 pm 
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Joined: May Sat 30, 2015 11:49 pm
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Location: Keystone Heights, FL, USA 32656
Looks good. Did two of the transformer holes line up with the panel holes?
I modified a schematic from this page https://www.radiomuseum.org/tubes/tube_vt-class_ii.html.
I think it is right. EDIT: Maybe not. Alternate schematic suggested, below.
Attachment:
Untitled1.jpeg
Untitled1.jpeg [ 90.04 KiB | Viewed 2408 times ]

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Last edited by jrehkopf on Jul Fri 23, 2021 4:29 pm, edited 1 time in total.

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 9:19 pm 
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atwaterkent1 wrote:
Removed the old wiring and positioned transformers. I'd like to see If I can do a better job of plugging the holes in the faceplate before I go any further. Best way to do it?
Has the question about the jack (holes) been answered? Are they original holes, factory filled to be without jacks. Are the holes drilled later, i.e. not in good alignment, chipped out, elliptical, wrong size. If it is determined they are original then IMHO seek early jacks and restore with jacks. If they are user drilled then fill or used a machined plug to fill. Unless the intent to use the early AP tube(s) IMHO the bias setup via the rheostat's does not seem applicable to the 201... BTW the value of the existing rheostats will also determine if the amp can tolerate the 201a.
Dan I understand the need to operate but it may require a conversion to move it from 1920 to 1923-4...
Try mixing a measured portion of black dry colorant to a sample cure of J-B weld. If the color is good and it cures hard ++...Chas

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 Post subject: Re: Wireless Specialty Triode Type B Amp Photos
PostPosted: Jul Thu 22, 2021 10:25 pm 
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Location: Boston, Massachusetts
This uses the VT tubes.

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