[Hammarlund] Seeking Guidance to Repair HQ-170

[Kim Elmore]

This is my first post to the group: I have an HQ-170 that has me 
flummoxed. It's has been "in the family" since my dad (W5JHJ SK 2007) 
purchased it new in May 1959. It, along with his WRL Globe Champion 350, 
comprised the first station I operated as a Novice in Fall 1970.

While I have a fair bit of experience working on the Champ, I have very 
little with the HQ-170: it simply has never needed much. My dad made no 
significant modifications to it aside from adding a modern 3-wire cord, 
an I.F. out port, and a plug for the mute circuit. A while back I turned 
on everything to let it warm up and was alarmed by a burning-paper 
smell. The source of the burning-paper odor was the '170. Upon removing 
it from the case, I discover half of an incinerated 1/4 W carbon 
resistor sitting in the bottom. A brief inspection reveals the other 
half remains soldered to a pin on T2, the transformer just to the rear 
of the 6BE6 1st converter (V3). The other side of the incinerated 
resistor is, or rather was, wired to terminal strip that has a lead to a 
pin on T6 (immediately behind V5, the second converter) that oddly 
appears to be vacant on the schematic. The linked image shows where the 
incinerated resistor was, circled in red. The resistor you see in the 
image is a out of my junk box and I put it there only so I don't lose 
track of where the incinerated resistor was.

A link to the image is here: 
https://drive.google.com/file/d/1wD4ZJ8Y8QhLlgcJzYyYHEObE5YwCNjAo/view?usp=drive_link

I'm posting this in hopes that someone else has encountered the same 
problem and can guide me to a proper repair.

73, N5OP

-- 
Kim Elmore, Ph

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, UAS, N5OP, 2nd Class Radiotelegraph, GROL)

/“Listen, it's too big a world to be in competition with everybody else. 
The only guy I have to get better than is who I am right now.” – Col. 
Sherman T. Potter, 4077 M.A.S.H./