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Hi Everyone, So, I have an HR 2510 on the bench and have done a cap replacement and the removal of the crazy glue of death (which was a lot). This radio is missing Q121 and I have no idea why. It does receive and transmit. Has anyone seen a mod where you remove Q121 or have any thoughts as to...

Drew, The 2 things that come to mind is the background audio is too loud and causing transmit power or the carrier balance pot (VR7) is not aligned.

There are 3 caps on the display board that I have replaced and fixed things. Also, on the CPU board replace the 2.2uf 50v and the 0.1uf 50 v next to IC314, those are the CPU Reset circuit caps. They cause bootup errors like the blank display and no TX or RX. Thats from Rogerbird.....

Hi Gang, So, I picked up an HR 2510 and I have found some interesting thing sthat I have not seen in one before. This will be my 5th 2510 that I have worked on by the way. The 1st discovery was the the confuguration for the switch that was installed on the back. It has a resistor and diode...

Hey Everyone, So, I am working through a President HR2510 and after removing all of the glue I was wondering what you use in place the Sony Bond (brown glue) if anything? I was thinking more in the lines of what to use on the inductors. Once you remove the glue the ferrite ring is now loose as...

To help everyone understand the specific amp I am speaking of see the attached pics. The amp is really in great shape. My hesitancy is the cost of the transistors and the unknown source of the replacements (see pic). I just have not worked on amps very much and I don't want to blow a...

@tramdr He has worked on these before. Check out his YT channel.

Hey Buddy, I am doing great!! I had to have a hip replacement last month and man its like I have a new life. I was young on average (59) for that and my recovery was amazing so now I can get back to the great outdoors. I love watching all of the radios and accessories you are buying!!! Take Care

I would start with the replacement parts. What did you use as a pre-driver, driver and final and where did you get them? Most of the time when they blow they do not take out other parts (although it is VERY possible they could). My initial guess would be you picked up bad/fake parts unless...

Gocha!! I have collected 163 (including a few duplicates and triplicates) Sams manuals over the years. When I try to make copies for folks I get so-so results mainly because of the arch in the page from the binding. I just have not brought myself to cut pages out so I could make better...

Hey Dan, I hope you are wel!!!

A couple things here.... 1 - You (and Dan) are super kind for sharing these!!! 2 - This doc is done VERY well!!! How did you make this? Did you have to cut this out of the maunal to scan them? Thanks!!

There is some good wisdom there!!! I don't mind working on something that broke even when its broken through foolishness like trying to get tooo much out of a radio. I do have reservations when someone else has been in it though. Thats when it can quickly get beyond my abilities. I also work...

I picked one up at an estate sale and it did not transmit at all. It did not even trigger the XMT light. I started with a recap and a good cleaning and the radio works great!!

Hi Everyone, I have a DX500 from a local op and asked me to replace the pills with new ones he had supplied. The amp is in great shape so I thought, sure. I was wiling to do that with the understanding that I am not guaranteeing it will work. When I opened it there was a burned resistor in a...

Hi There, You might want to verify the connections or the drawing. The radio goes into the RTX and the ANT goes to the SWR meter.

Mikes radio repair YT channel has a fairly long example of that board and how to make a mod for it. I believe he replaced that resistor and put it on the back of the board and extended it farther from the board. If you can find that vid I think it will help you out.

Hi Gang, I will cautiously chime in here as I don't want to fuel anyone who is angry. When you have someone that you are engaged with in life whether its freinds, family or a service person like Mike and you see them go from one extreme to another I think that lends itself to a logical...

Also, a 1Khz audio tone is a standard in radio use/service. It's just easy or better to stick with the standard and because of everything Brandon said.....

This is a good point but lets try to remember what is to be accomplished on the original question. Radiomatrix is looking for an easy/basic solution to undertand the frequency his radio is on. In these cases a perfectly calibrated device is a little bit of a reach unless the calibration was...