R-4C tuning problem

Ron KJ7PAQ All Messages By This Member #76761 Hi: I am new to this group. I acquired some Drake equipment from the estate of a sk. Starting with the receiver (R-4C) I noticed the two plastic discs with the freq markings don't move when you turn the tuning knob. I removed the cover and saw that the tuning slug moves fine when turning the knob. Does anyone have an idea what might be wrong, what parts might need to be replaced, are they available? Is this going to be a major job?? Hope I didn't bite off more than I can chew? Hi Hi. Any advice, suggestions or info would be much appreciated. 73 Ron? KJ7PAQ ronburski@...
Jim Shorney All Messages By This Member #76762 You may have a bushing issue. Easily fixed. /g/DRAKE-RADIO/topic/94173997#67672 73 -Jim NU0C On Sat, 16 Mar 2024 22:36:59 -0700 "Ron KJ7PAQ via groups.io" <ronburski@...> wrote: Hi: I am new to this group. I acquired some Drake equipment from the estate of a sk. Starting with the receiver (R-4C) I noticed the two plastic discs with the freq markings don't move when you turn the tuning knob. I removed the cover and saw that the tuning slug moves fine when turning the knob. Does anyone have an idea what might be wrong, what parts might need to be replaced, are they available? Is this going to be a major job?? Hope I didn't bite off more than I can chew? Hi Hi. Any advice, suggestions or info would be much appreciated. 73 Ron? KJ7PAQ ronburski@... -- 73 -Jim NU0C
Steve Wedge, W1ES/4 All Messages By This Member #76767 Yep. Needs a new bushing. The exact part is Unobtainium but you can make one from a piece of 1/4” fuel hose. Cut to the same length as the bushing and ensure the Ends are square or you’ll see the skirt looking crooked when reassembled.? The inner and outer shaft are meant to rotate at the same time at the same rate. Holding the skirt whilst turning the knob adjusts the fine calibration.? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from for iOS toggle quoted message Show quoted text On Sun, Mar 17, 2024 at 02:29, Jim Shorney <jimNU0C@...> wrote: You may have a bushing issue. Easily fixed. /g/DRAKE-RADIO/topic/94173997#67672 73 -Jim NU0C On Sat, 16 Mar 2024 22:36:59 -0700 "Ron KJ7PAQ via groups.io" <ronburski@...> wrote: > Hi: > I am new to this group. I acquired some Drake equipment from the estate of a sk. Starting with the receiver (R-4C) I noticed the two plastic discs with the freq markings don't move when you turn the tuning knob. I removed the cover and saw that the tuning slug moves fine when turning the knob. > > Does anyone have an idea what might be wrong, what parts might need to be replaced, are they available? > Is this going to be a major job? Hope I didn't bite off more than I can chew Hi Hi. > > Any advice, suggestions or info would be much appreciated. > > 73 > Ron KJ7PAQ > ronburski@... > > > > > -- 73 -Jim NU0C

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R-4C tuning problem