Col-R-Tel: The Missing Manual Pages, Part 2

Hawes Mechanical Television Archive

by James T. Hawes, AA9DT

Col-R-Tel: The Missing Manual Pages, Part 2

How Col-R-Tel logo might have looked in color

Converter Box Dimensions

Length: 15.75"	Width: 3"	Depth: 4"
The 15.75-inch measurement doesn't include the two end transformers. The power transformer adds 3-1/8 inches of length. The motor transformer adds another 2 inches. With transformers, the total length is 20-7/8 inches.

Illustration, front of converter chassis
with parts callouts (mechanisches Farbfernsehen)

Converter box front, left to right

Part ID	Part #	Name on panel	Function	Value	Comment
T1	1049	NA	B+ step-up transformer	Primary: 117 VAC, 60 Hz; Secondary: 300 VAC	Transformer with metal bells
S1	1022	OFF - ON	Power switch	Unknown	Horizontal mount slide switch
Adjustment hole, T2	T2 = 1054	NA	Transformer access	Transformer secondary: Variable, 22-56 μH, est.	Bottom of ferrite slug. Burst transformer. Top slug tunes primary. Bottom slug tunes secondary.
Coil slug adjustment L3	1077	COLOR LOCK	L3: Hue control coil	L3: Variable, 15-26 μH, as measured by C. Benham	Knob #1, hue control. Adjusts L3, "COLOR LOCK" coil.
R22	1024	COLOR GAIN	Saturation control potentiometer	10K	Knob #2. 10K pot in V4, 6BE6 plate circuit.
R40	1025	MOTOR SPEED	Rheostat	35 Ω / 25W	Knob #3
S2	1008	MOTOR START	Momentary switch	Unknown	Vertical mount, momentary "push" switch. Looks like slide switch.
T3	1048	NA	Motor transformer	Unknown	Transformer with paper bells. Variable impedance; motor brake.

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NOTE: The Col-R-Tel logo and chassis illustration above are my own creations. They didn't come from Col-R-Tel documents. My copyright covers both pieces of art. Omissions and errors are my responsibility. – JT Hawes

•URL: http://www.hawestv.com/mtv_color/colrtel_parts/colrtel_missingpp_2.htm •Webmaster: James T. Hawes
•Revision—May, 2009 •Page design tools: HTML, Notepad & Explorer

For data contributions to this page, thanks to Cliff Benham.