No pictures yet, but I've already removed most of the components I've identified as mods or part of what appears to be a MOSFET kit? Here's what I've found so far;
-The final was replaced with one that says IRF520N on it.
-R56 was replaced with a 410ohm resistor and 1n4148 diode added to it.
-C53 was removed and replaced with a 3.3k ohm resistor, appeared to have a second resistor on the foil side(forgot to get value).
-R100 has an 1n4148 diode added to it.
-C61 was removed.
-D4 and D24 both replaced, haven't pulled the diodes yet to determine type, small and bright blue, not glass.
-R48 appears to have a second resistor added on the foil side, 150k ohm.
-L14 slug removed
-Talkback resistor was added.
-Bandit Echo Board was added.
Most of the work I've identified on this radio I think may be explained by the "MOSFET Supertune (29LTD classic and newer)" mode on this page - https://www.dtbradio.com/tips.html- or something similar to that mod.
Before working on it it did receive and transmit, albeit poorly on both according to my tuned/aligned General Lee monitoring radio. On the Bird 43 it looks like it was dead keying at 4w and swinging around 15, but I think the peak kit I installed isn't being honest about modulation. Was spiking to 30w+ in peak mode on the Bird.
I believe this is a '97 model and I have a '98 or '99 laying around but it's a different board version so I'm not sure how identical it would be for me to use it as a reference to figure out the components I need to get this one back to stock. For some reason I always have a hard time trying to figure out proper replacements for those little orange disc caps. I'm guessing the missing slug is not something I can easily find other than from a parts radio, and how important is that slug?
Will get some component and foil side photos of this radio next time I can get out to my workbench.
-The final was replaced with one that says IRF520N on it.
-R56 was replaced with a 410ohm resistor and 1n4148 diode added to it.
-C53 was removed and replaced with a 3.3k ohm resistor, appeared to have a second resistor on the foil side(forgot to get value).
-R100 has an 1n4148 diode added to it.
-C61 was removed.
-D4 and D24 both replaced, haven't pulled the diodes yet to determine type, small and bright blue, not glass.
-R48 appears to have a second resistor added on the foil side, 150k ohm.
-L14 slug removed
-Talkback resistor was added.
-Bandit Echo Board was added.
Most of the work I've identified on this radio I think may be explained by the "MOSFET Supertune (29LTD classic and newer)" mode on this page - https://www.dtbradio.com/tips.html- or something similar to that mod.
Before working on it it did receive and transmit, albeit poorly on both according to my tuned/aligned General Lee monitoring radio. On the Bird 43 it looks like it was dead keying at 4w and swinging around 15, but I think the peak kit I installed isn't being honest about modulation. Was spiking to 30w+ in peak mode on the Bird.
I believe this is a '97 model and I have a '98 or '99 laying around but it's a different board version so I'm not sure how identical it would be for me to use it as a reference to figure out the components I need to get this one back to stock. For some reason I always have a hard time trying to figure out proper replacements for those little orange disc caps. I'm guessing the missing slug is not something I can easily find other than from a parts radio, and how important is that slug?
Will get some component and foil side photos of this radio next time I can get out to my workbench.