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21
Electronic connection / yaesu ft7250 error message on transmit
« Last post by kinkydoints on February 20, 2020, 03:10:23 PM »
im looking for any info on a issue I have with my 7250. In November I left my truck at the airport long term parking with the radio ON, I have it hard wired to the battery with a 8 gauge set of wires to a power outlet setup after a heavy duty switch....bad move. 10 days later on return, after getting a jump start, my radio would not transmit . got "error" message on keying up mike. after a reset to factory settings via the book instructions.  not sure best fix? am I stuck with a return to factory to get serviced?
22
CB Radio Repair Forum / Re: Galaxy DX2517 horrible spurious emissions and low power
« Last post by diamondred on February 08, 2020, 02:19:22 PM »
First post didn't post. Is this the same PCB as in the DX99V2?  EPT690010D?
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CB Radio Repair Forum / Re: Galaxy DX2517 horrible spurious emissions and low power
« Last post by diamondred on February 08, 2020, 02:16:56 PM »
?
24
Ham Radio Circuits and Repair / Re: HTX-100 repair
« Last post by WB2SVF on February 06, 2020, 05:46:20 PM »
Thanks for that guidance.  I took the PLL board out and removed it from the can so I could examine the foil side.  I checked every square inch of that board with my focusing loupe (...I do large format photography, too...) and a flashlight and I could find no weak or cold solder joints.

Not on the PLL board but on the main board, there is a lot of that glue that is blobbed onto the base of some of the components that has turned brown.  Should I chip away at it with a small jewelers screwdriver?  Or is there something that I can use on a Q-tip that would dissolve it?

I'm wondering if the PLL might be OK, but there may be some signal from the PLL that is being shunted to ground because of that glue?

If I am not successful finding the problem, do you still repair these radios?  To be honest, I no longer have any test equipment other than my VOM...  so I'm not sure how much diagnosis I can do other than look for shorted or open components and check for voltage at specific points.  I just boxed up my TS-850SAT to send out for repair (similar symptoms, actually...) and thought I would get the 10M HTX-100 going while the 850 is away... LOL  All that's left is to try my homebrew 20M QRP rig.

Thanks, again for your guidance.  And I have really enjoyed watching your videos.  I wish YouTube had been a thing back when I was active the last time.

Wes, WB2SVF
25
Ham Radio Circuits and Repair / Re: HTX-100 repair
« Last post by The Radio Shop on February 06, 2020, 02:16:59 PM »
First welcome to the site.

This sounds like a known issue with the radio in question.
Have a good look at the PLL board.  It is the smaller board sitting in the can that is attached to the chassis on one side.
You will need to unplug this board and remove it from the mount. Look closely for weak solder joints. They are there.
Also look for Sony Bond glue. This is a beige color glue that was used to hold parts down.  It has probably turned dark brown by now.
This stuff is very conductive and causes shorts.

I understand what you said about the capacitors.  But to be really sure you have to remove them and see if they leaked onto the board.

You can get the service manual here:
http://www.cbradio.nl/realistic/Service_Manual_Realistic_HTX100_Homer_ENG.pdf

Let us know what you find.

Buddy
26
Ham Radio Circuits and Repair / HTX-100 repair
« Last post by WB2SVF on February 06, 2020, 01:22:38 PM »
I have an HTX-100 that needs some repair and I need some guidance... my only repair experience is on things that use tubes and weigh 50 lbs... if it has ICs, I simply have become an appliance user.

I was forced to take down my station 10-12 years ago - - this radio has been in storage in my house since then with no temperature extremes.  I am the original owner and it was working when I put it into its box.  I am now setting everything back up.  When I apply power, the display light lights but there is no information... no frequency, no nuthin'.  There is audio, but there is no static sound when I connect the antenna.

My first thought is: bad capacitor.  I pulled off the cover and looked at both sides of the main boards with a flashlight and magnifier... none of the capacitors had an indication of having split or burned, and there was no trace of leakage on the solder side of the boards.  I do not have a full schematic or a shop manual, so I don't know where to turn next.

I watched Buddy's repair YouTube where he brought back to life an HTX-100 and checked what he did in that radio, but I do not think I have that problem... 
27
Ham Radio Circuits and Repair / SR-400
« Last post by Lacera on February 02, 2020, 10:30:44 AM »
I have a Hallicrafters SR 400 in need of some TLC. It has been on my 'most wanted' list a long time so when I found one with ps on QTH at a good price, I snatched it. According to the seller, the rig was in good condition and working but the switch was bad and had to be turned on/off using the power cord. Photos showed a powered up rig that was clean inside and out. The ad was placed in april 2018. I sent the seller an email inquiring as to its availability and it was. I got both for $300 with shipping.

Once I got them home on the bench, I slowly powered them up on a dim bulb and variac, all good. There was no audio and the switch was working. So some things had happened to the rig between  2018 and when I got them in Oct 2019. First I replaced the 2 line power cord that was cracked and frayed from old age on the PS with a new 3 line modern cord then started working on the sound problem. Rig worked fine for several days then died overnight. The only problem I can find is the primary windings are shorted.  Since I dont have another PS, the rig has been left untouched. I have aquired another PS now and would like for someone with more knowledge on rig repair to get the radio back in working condition to use with the new PS. If possible I hope Buddy will undertake the repairs and do a video on it. It would be something I'd cherish for the rest of my short life. This is one rig I want to work as it should and not subject to my lack of abilites. I would appreciate any help.
28
New member welcome / Re: Newbie Notification
« Last post by Lacera on February 01, 2020, 05:54:46 PM »
Very nice to here from you, Mr. Buddy. Me thinks this might be my new adopted home with all the glowing tubes, crackle of RFI and the 'DANGER! High Voltage! warning stickers. <Wiffs a faint trace of ozone> Makes this girl kinda.. well... excited!

You seem to have quite a following that is enthralled with your unique brand of electronic wizardry so I decided to join in the fireworks. Hopefully without any serious surprises. I am in the process of watching all of your videos and can well understand their enthusiasm. Your ability to convey your mechanical and electronical 'savy' in a delightful 'southern' drawl makes for interesting 'how-to' videos.

Anyway, I am glad I stumbled on this site. From the looks of it, there is a plethora of information that begs investigation and I for one, plan to investigate. I look forward to watching it's popularity grow again. It has hugh potential. I have so much I need to learn understand about my vintage equipment. I will be here for a while.
29
New member welcome / Re: Newbie Notification
« Last post by The Radio Shop on February 01, 2020, 03:54:55 PM »
Welcome to the forum.
Thanks for the intro. Sounds like you been around the block quite a bit.  I always love hearing others story.
So thanks for sharing that.

The forum has a lot of members, but slow to post.  Seems no one wants to engage is good electronic talks and rag chew on the forums anymore.  A bit different from the big forums where they start shouting " get off my lawn" lol.
Anyway I am trying to get this place back up and running so sit back and have fun.

Great meeting you.

Buddy
30
Vintage Ham Equipment / Re: Swans
« Last post by The Radio Shop on February 01, 2020, 03:49:28 PM »
Nice set up.
Not only Swans but I see a lot of the same equipment I have.
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