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A little off topic but does anyone have some advice about how to take the board out of these 575m6 mics? How do you get the sliders past the cut outs to remove the board. I don't want to break the plastic by trying to pry it out. Any help is appreciated.

Very good explanation Andy. Once again you've definitely help me wrap my head around something that I couldn't understand. I also just read what you posted in the other forum on the PC-122 clarifier. Another great little article related to this topic. Thanks again!! Tom

Once again Andy thanks for all the detailed info. So I performed the mod as Switch Kit suggested and it works perfectly. One question I do have that you may be able to clarify...Switch Kit recommends to add D52 in line with the white wire when connected to the 8V constant supply to improve...

Ahh I wonder if this is the mod from the previous page of this thread that Switch Kit posted. That requires taking the white wire that ties to R44 and moving the opposite end to the open hole next to R147. If course then I would have to also remove D52. Could that be the one that you're thinking...

Very old post, I know but this mod looks interesting to me. So Switch Kit, with this mod there is no need to disturb the 8v wire (red) that comes from the clarifier? If I'm reading the post correctly I would only have to move the white wire from next to VR3 into the spot next to R147 and remove...

Thank you for that info. I've actually bought an A kit from you on ebay for my 29 and it worked great. I've recently bought the 5 position rotary kit from you for my 148 as you said it would be more stable on ssb than the crystal based board kits. You have fantastic customer service on ebay and...

I meant of course Mitsubishi 1969s lol

999 got the pics. Very nice and descriptive. They will be of great help to me when I tackle this! Thank you!!

Indeed I would be if you have the spare time to dig them up. Pics are always very helpful for sure. First time muddling my way through a 148 so I'm wide open to any ideas here. Didn't know if the clarifier mod would make it impossible to tune in ssb. That is my fear with it.

Yup it certainly did that time. Well hell yeah that's one sweet little setup you have there my friend. Love them shiny little birdies for sure making me a bit jealous lol. Well there's a fella that sells what's left of the Expo kits and he's got a nice 5 position rotary switch nicely wired into...

Same

For some reason the video link is saying that it's private and will not allow me to view.

Did you do this to a later model (Chinese) or an earlier model like a Philippine or Malaysian made one and does it even matter?

Sonoma, do you still happen to have any expo kits for the 148 and if so would you be willing to part with one. I know this thread is a couple of years old but I stumbled across it and figured it would be worth a shot. Been trying to hunt one down for months. 73s Tom

I ordered the 270-030 on ebay. Thank you for the info. I am going to attempt to install when it comes in the mail and may need further assistance if I get stuck. Pictures always are the best help. Like they say, a picture is worth a thousand words and that is true for me. Yes the only mod I've...

Well I picked one of these up from fleabay just in case I feel motivated to do this mod down the road....maybe with a Mosfet final to handle the extra.

I did try the mosfet 520 upgrade but didn't see much benefit to it so went back to stock 1969. I'm lucky enough to have two older genuine Motorola 1969s that I've been hoarding for years just in case.

That does seem like a lot of modding for what it sounds like something that may just fry the 1969 at the end of it all. This is why this forum is so great and why I like to get educated opinions before jumping forward. Thanks for explaining this to me. It sounds like I should just leave it as is...

I do understand the concept of four times the power is equal to one s-unit on the recieve end. I would just like to be able to fully drive my amp. I didn't think that supplying 12 volts to a 1969 would be harmful in any way. Radios other than the 148 deliver 12 volts to the 1969 by design don't...

So this is a 2001 Chinese model. Where is the AM modulator transistor located on this radio? Do I just clip the test lead and then essentially make a connection between the center leg of the transistor to the pin that the test lead connects to. Please forgive my inexperience with this one.