What can I say? It's an amazing one, great design and sound, especially comparing to my childhood tiny RQ-4050FD...
Both original 76-90 Mhz and 100 VAC are quite disappointing.
FM due to the fact that it only picks 2-3 stations from the bottom of the US band around 88-90 Mhz.
100 VAC is simply a disaster area - RX-7200 is made to work off 12-15 Volts DC as noted on the back.
When plugged into Florida's 120 VAC outlet (outputting about 125V) the internal transformer outputs 17.5 VAC as a result!
After the rectifier bridge is sends pretty much fatal 22.5(!!!) Volts DC to the main board which would kill the 33-years old beauty quite fast. It can run off DC adapter, but most of recent adapters are switch mode not linear, so they would cause extra interference plus it's large external non-OEM piece.
I took care of both issues so now it has full coverage on 88-108 Mhz with correctly displayed frequency and normal power voltage. What else can be done? Full re-belting is done, pinch roller replacement is pending roller arrival.
Dead indicators lamp might be replaced with the warm white LEDs tomorrow but this is mostly cosmetics.
Will replace power filter cap alone with a few dry ones in but I'm against the total recapping.
BTW is someone needs FM conversion or 120-220 VAC power PM me - there is no need to ship the whole boat, just a few blocks.
Both original 76-90 Mhz and 100 VAC are quite disappointing.
FM due to the fact that it only picks 2-3 stations from the bottom of the US band around 88-90 Mhz.
100 VAC is simply a disaster area - RX-7200 is made to work off 12-15 Volts DC as noted on the back.
When plugged into Florida's 120 VAC outlet (outputting about 125V) the internal transformer outputs 17.5 VAC as a result!
After the rectifier bridge is sends pretty much fatal 22.5(!!!) Volts DC to the main board which would kill the 33-years old beauty quite fast. It can run off DC adapter, but most of recent adapters are switch mode not linear, so they would cause extra interference plus it's large external non-OEM piece.
I took care of both issues so now it has full coverage on 88-108 Mhz with correctly displayed frequency and normal power voltage. What else can be done? Full re-belting is done, pinch roller replacement is pending roller arrival.
Dead indicators lamp might be replaced with the warm white LEDs tomorrow but this is mostly cosmetics.
Will replace power filter cap alone with a few dry ones in but I'm against the total recapping.
BTW is someone needs FM conversion or 120-220 VAC power PM me - there is no need to ship the whole boat, just a few blocks.
due to schematics absence. I've been doing these mods for over 10 years now mostly on car radios. Plus I worked in consumer electronics repairs since early 90-s. 
