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Re: HT-45 Mods/Upgrades
Jim, I have a P-2000 available that I listed on this group in May 2024. Search ¡°P-2000¡± to see it or at this link
Re: New Arrivals!
Nice finding! I worked on an SX-9 a couple years back for a friend. I was surprised at how well it performed. Enjoy! TomW3TA
By thoyer · #30954 ·
New Arrivals!
I did it again..... Went to an estate sale and 2 more Hallicrafters radios follow me home!?? Got an SX-9, and an SX-42.? the 9 plays quite nicely as found (newer power cord, and it was found
By Howard · #30953 ·
Re: Gold Halli logos wanted for S-14 and 5-T
One of them , the 5T or the S14, had a faded gold emblem.? Must have been the more recently restored S14 if I began this pursuit when wrapping that one up.? Now that you mention it, the other was
By Daniel K1DTS · #30952 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
Halden, I have been wondering about the HV winding wire size{S}. From your ¡°stuff¡± I would say ¡°the turns near the Center Tap need to feed B+ current and B++ current so must be thicker, while
By don Root · #30951 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
A clarification to my post 30946: By "inner" and "outer" I meant from the perspective of the winding's schematic.? The wire between the HV taps and "B+" taps has higher resistance per volt developed
By HF · #30950 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
Thanks for the comments, everyone! I don't think the dielectric constant of material in the gap matters much here, but dielectric strength does.? At 2000V, I get a spark across the gap.? If the
By HF · #30949 ·
Re: Gold Halli logos wanted for S-14 and 5-T
I have two 5-Ts , one with the later dial type, but the logo is not present (front panel has been repainted) and an unrestored 5-T Sky Buddy (Radio Boy dial) with the original Hallicrafters logo
By caladonia5560 · #30948 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
It is doubtful that the wire gauge for the high voltage secondary is different below the center tap then above it.? As the winding progresses from the lowest level to the highest, the length per turn
By Jim Whartenby · #30947 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
Some more information about this transformer's arc-through injury: I used resistance measurement between the arc site and the HV winding terminals to estimate where on the HV winding the arc-through
By HF · #30946 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
As a suggestion, try contacting Heyboer Transformers in Grand Haven Mich to see if they can rewind the transformer? Contact Heyboer Transformers <https://www.heyboertransformers.com/contact.shtml> 73
By Mike · #30945 ·
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
An update: I'm going try to keep the filament winding.? I was able to loosen 3 filament winding turns.? Between the time I posted the message with the 3 photos and when it appeared here, I posted a
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
Jim,I thought this had died.? Seems that the fellow would be better off rewinding the transformer with new and better insulation wire, I doubt that the RTV will do what he intends. Still real dampish
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
HaldenWhat is the dielectric strength of the RTV that you plan to use??? Dow 3120 has a rating of 457kV per inch so this may not be good enough to prevent another punch through in the same
Locked Re: HT-37 transformer failure due to rapid STBY-->OFF-->STBY
I further opened up the transformer that Randy donated for the cause, in preparation for removing the ¡°YEL¡± 5V winding to look for the arc path between it and the HV winding. Once I got tape off
Re: Gold Halli logos wanted for S-14 and 5-T
Looks good!? I am getting ready to dig out my ALPS printer and make some decals and I think I have some gold foil ribbons so I might try this. 73, -- Justin B. KI5GKD
By Justin Bowser - KI5GKD · #30940 ·
Re: Gold Halli logos wanted for S-14 and 5-T
Your printing on white took me back to old school method.? Pasted the logo into a black square in MS Paint and used the paintbrush & pencil to fill in the white. Then printed onto plain white copy
Re: Gold Halli logos wanted for S-14 and 5-T
No, a standard inkjet from Cannon.? I also have white decal paper but it's not transparent, the white background showing in the circle and letter voids looks awful. I only run into this issue with
Re: Gold Halli logos wanted for S-14 and 5-T
Dan - I remember buying white decal paper several years ago.? Are you using an Alps MD printer? 73, -- Justin B. KI5GKD
By Justin Bowser - KI5GKD · #30937 ·
Gold Halli logos wanted for S-14 and 5-T
Finished the S-14 restore this weekend, it'll join the 5-T in the collection. I need to source the gold Hallicrafters logo each originally had in the upper right corner. My standard printer makes a