Max Miller TV Flyback VIC
Max Miller Ebay VIC Core Source Purchase Proof
Max provided a Thingiverse upload that was utilizing a TV flyback transformer core as a potential VIC alternative. In this thingiverse, he provided a YouTube video demonstrating this VIC in operation:
Towards the end of the video, there are two screenshot that give an Ebay source for this transformer. Please take note of the seller's location. Miami Florida. Note that this core is now $60 upon latest checking (11-19-2022).
Below is a view of the ferrite core's markings. "88888" "XXXXX" "HHHHH".
A core from this reference was purchased. According to the seller's description, the part in photo is the actual part in their inventory.
My box with proof it was from Dalbani in Miami Florida. The smaller white box is directly off Ebay posting.
Ferrite cores that arrived to me had same markings as shown above:
STLs provided by Max
tv_core_end_caps_bigger_socket.stl
Dimension issues
Based on the below review, I would not recommend anyone purchase from the source on Ebay provided by Max. Below is a record of issues from this purchase. This core is now $60.
From the Ebay source, the dimensions between Max's core and the one I received is quite a bit off. Below is my ferrite core (on top), and a 3D printed version of what Max provided (which is assumed to be same dimensions of core he has).
In the interest of making these core differences work out, I have redesigned the provided bobbin half pieces. Below is a link to the STL for 3D printing if you're so inclined to have purchased one of these cores. Please note that the thicknesses is 0.31". May need filing so core can fully meet together. 0.01" may be removed from each half piece center joining point.
TV Flyback VIC core bobbin remeasured v1.stl
The bobbins are to be wound with #30 gauge wire. Diameter = 0.01"
Bobbins volume dimensions are based on bobbin dimensions:
0.53"/0.01" = 53 turns per layer height
0.62"/0.01" = 62 turns per layer width
53 * 62 = 3286 turns maximum per bobbin.