Hi, firstly I put my hands up and say I know little about electronics as such, but have keen interest in challenges.
So I bought the FRG 7000 locally for £50.00, the guy said it was dead other than all the lights come on and it hisses.
Once I had the cover off I could see it had been well and truly got at in terms of alignment. Each IF can had a penned line on the edge with not one of them lining up. Anyway to cut the chase; with nothing much to lose I have painstakingly worked through them guided only by ear, and have reached a point where I can go no further.
I should add I have stripped the band selector and cleaned all the contacts and rebuilt it and all is working well and as it should.
I have tons of transmissions coming in on LW, MW and all the way up to 40mtr, with loud clear and plentiful sideband transmissions on 40. From then on it gets increasingly quiet. The peaking of the Mhz control gets more and more difficult , there is no peaking hiss.
So my question is this, given the liveliness and sensitivity up 7 possibly 8 Mhz, what would cause it to tail off so, particularly the peaking of the Mhz control.
What am I missing...apart from equipment like a frequency counter, sig gen and brains etc. ?
Any help appreciated.
Regards.