| Author |
Message |
    
Brian
New member
Username: Brian
Post Number: 1
Registered: 4-2008
| | Posted on Monday, August 11, 2008 - 10:18 am: | 
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Hi guys,
This is the first time I've actually asked a question on here. Most of the time I just read everything and learn a ton. but I recently bought an Eagle 300 DX. I knew it wasn't working and I've made it a project. But I can't find a schematic or a manual anywhere on this. Does anyone know who made this or anything? If anyone could help, man I would sure appreciate it. Thanks Brian. P.S. photo enclosed. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4364
Registered: 7-2004
| | Posted on Monday, August 11, 2008 - 10:14 pm: |
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they are ALL the same for the most part. there probably is no schematic or manual for THAT amp, specifically. they ALL work the same, too. probably somebody copied an older boomer-they are very 'generic' & well copied-it uses the same switches and 'spotted' face. i actually have a schematic for them, somebody did one for me from the amp i had, so it could be 'copied'. that was in the late 80's. does the cover 'lift' off, or 'slide' off? take a few good pics of the inside. what transistors are in it? what does it NOT do that makes you say it doesn't work? |
Brian
New member
Username: Brian
Post Number: 1
Registered: 4-2008
| | Posted on Thursday, August 14, 2008 - 2:07 pm: |
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Thank you for responding to this, Patzerozero.
Well the amp came to me with it's pills removed, but that's not the main problem because I know I can take care of that. The main issue is that there is a purple wire and blue/white wire used as jumpers going from across the board and from the back of the board to the front. The owner says he thinks it just has a bad resistor, but I was really hoping there might be a schematic out there in never never land to use as a "roadmap". Again, thank you oh so much for your help. Brian. |
Brian
New member
Username: Brian
Post Number: 1
Registered: 4-2008
| | Posted on Friday, August 15, 2008 - 12:28 pm: |
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I guess I should clarify myself on the above post, when I mention the owner, I meant the prior owner. I'm the owner now. Thanks guys, and any help would be great. Brian. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2568
Registered: 1-2005
| | Posted on Friday, August 15, 2008 - 12:44 pm: |
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Oh my! You got a tough job on your hands there Brian! Sure that all that is missing is transistors? Good luck with it.
KEEP IT REAL!
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Brian
New member
Username: Brian
Post Number: 2
Registered: 4-2008
| | Posted on Friday, August 15, 2008 - 4:08 pm: |
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...Great. Does it look like a lot more is missing? I can't see really any solder points where something's been taken off the board? |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2571
Registered: 1-2005
| | Posted on Saturday, August 16, 2008 - 1:21 pm: |
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Seems like there should be more wiring in there to me. With the pills missing and looking at the red and black primary wires they look disconnected it is going to take a lot of heat and quick soldering work to get things back right.
Does the last owner know what model pills were in it? Putting the right pills back is very important so that the amp will function properly.
KEEP IT REAL!
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Brian
New member
Username: Brian
Post Number: 3
Registered: 4-2008
| | Posted on Saturday, August 16, 2008 - 2:40 pm: |
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I believe they were SD1446's. I will take the board out and get pics of both sides to post them here. Thank you all for the continued input guys! Brian. |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4376
Registered: 7-2004
| | Posted on Saturday, August 16, 2008 - 5:53 pm: |
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brian i sent you some info. let me know that you got it. |
Brian
New member
Username: Brian
Post Number: 4
Registered: 4-2008
| | Posted on Sunday, August 17, 2008 - 12:05 am: |
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Yes, I sure did. I'm going over the information you sent me for the next few days and I appreciate it very much. Thanks Pat. Brian |
Drzuo
Junior Member
Username: Drzuo
Post Number: 39
Registered: 1-2006
| | Posted on Sunday, August 17, 2008 - 6:51 am: |
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I'm not familiar with the box, it looks older, but may have just had a hard life. My guesses would be mrf 455's, sd1446's, or srf 3749's. The 1446's would probably drop in replace. Does the amp key? does the preamp work? Also look underneath the board and make sure no traces are burnt. The mica cap values on the input and output transformers may also give a clue, since most of these boxes are just copies.
I do see something interesting.It's hard to tell from the pic, but i am not seeing the large brick style resistor typically used in this type of amp's bias circuit. The largest resistors I see are more common of high- low side swamping resistors. and the ferrite bead with the purple wire doesnt fit the construction style of this type of box...does that wire go from the input transformer to ground? Like i said its hard to tell from the pic, but it looks like it was converted to a class c "comp box" if you will.
If you still have no luck, try to send a few pics from multi angles including top center. Looks like we all have a project! Have fun. |
Brian
New member
Username: Brian
Post Number: 5
Registered: 4-2008
| | Posted on Monday, August 18, 2008 - 12:51 pm: |
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I sure will guys, give me a day or two 'cause I work midnights but I will definately post some pics of every angle. And thanks to each one of you. Brian.
P.S. - I know this doesn't relate to the subject above, and you guys are LIGHT YEARS past me knowledge-wise, but - I've spent several months now experimenting with stinger-boards and novel ways to protect them from rf bleedage into the radio, using everything from rf shielding to rf chokes and miniature-wound baluns, with good success. If anyone is ever interested, just let me know and I'll explain. (I just wanted to offer something back, being everyone has been so gracious in thier help with this amp). Brian. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 2579
Registered: 1-2005
| | Posted on Tuesday, August 19, 2008 - 12:12 pm: |
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Brian, Besides hands on experience over several years. I have obtained a large amount of know how from the Copper Forum in a few years. Also reading books on the subject is probably the best source of info I have ever found.
You should get a copy of "The Screwdriver Experts Guide" by Lou Franklin. Copper sells this book and it is worth its weight in gold. Every cber should have this book handy and get rid of all the cb myth and bologna we have heard over the radio! Any book with Lou Franklins name on it you need it!
Other than that stick with the Copper Forum if you need the truth.
KEEP IT REAL!
Kenny
cef491(27.115lsb)
2sf491(27.555usb)
Indiana
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Brian
New member
Username: Brian
Post Number: 6
Registered: 4-2008
| | Posted on Friday, August 22, 2008 - 3:19 pm: |
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Guys,
Hi. This is the first time I've had to post these pics of this amp in question with my midnight shift, but I had to crop them so small in order to get them accepted that I don't know if they can even be seen!
I am trying to get them accepted at a larger size. I didn't take a shot of the under side because I was wrong - the jumpers didn't go to the bottom of the board at all. But if you need a shot of it please let me know, and thank you all again for your expertise with this. Brian.
Moderator Note!
Please submit all post's with pictures to the: Members Pictures area of the Copper Forum under your User Name.
This will also allow you to submit a slightly larger/clearer picture for other member's to see and offer help/advice.
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Hotwire
Senior Member
Username: Hotwire
Post Number: 2584
Registered: 1-2005
| | Posted on Saturday, August 23, 2008 - 1:55 pm: |
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Hey Brian, I'll look in the members picture section for the amp.
To help you with resizing you pics try going to xat.com
They have free downloads. Click "jpeg optimizer". It is so easy a caveman could do it!
Kenny
CEF491
Mudduck County
Indiana
The Hotwire Mobile coming soon to a radio near you!
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Brian
New member
Username: Brian
Post Number: 6
Registered: 4-2008
| | Posted on Friday, August 29, 2008 - 9:38 pm: |
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Hi Guys!
I was finally able to get an inside picture of this amp reduced enough to go into the member's picture area. It's under Brian, and Eagle 300 DX. If you get a chance, look at it and tell me think. Thank you guys. Brian. |
Brian
New member
Username: Brian
Post Number: 7
Registered: 4-2008
| | Posted on Saturday, August 30, 2008 - 8:51 pm: |
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Well, I don't see it in the member's pictures area. Maybe I'm supposed to put it here I'm not really sure. |
Tech808
Moderator
Username: Tech808
Post Number: 16053
Registered: 8-2002
| | Posted on Sunday, August 31, 2008 - 6:01 pm: |
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Brian,
All Pictures need to be submitted to the Members Picture area of the Copper Forum and are approved by the Copper Forummaster.
Lon~Tech808
CEF#0808/HAM#001/CVC#0002
Tech808@copperelectronics.com
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Brian
New member
Username: Brian
Post Number: 7
Registered: 4-2008
| | Posted on Wednesday, September 10, 2008 - 3:58 pm: |
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Hurray !!!
For everyone's FYI, the design of the Eagle 300 DX is exactly the same as the Palomar Red Devil 250R ! The schematic for this is at cb tricks.
Thanks to everyone for all the help. Brian. |
