Re: Drake LA-4 Amplifier
Peter Thanks for the info, ok on it being for the RR1 RR2. Great picture of the LN4 in the RR1. Sure don't remember seeing anything like that. I was not that familiar with their marine line products
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rrex lehman
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#77308
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Re: TR5 questions
Must have been the same old tech that told me, ¡°A screwdriver will never fix a broken radio.¡± Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p
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Mike Bryce
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#77307
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Re: L7 makes alot of smoke
Bob, Could you provide a few extra details? Were all of the parasitic choke resistors "fried"? ?If so, that might be symptomatic of a self-oscillation or parasitic. ?. ?With the strapping as a DC
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Evan
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#77306
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Re: L7 makes alot of smoke
Sounds like a plate-grid short. Check the tubes for shorts. Check the plate choke to see if it opened. Look under the chassis and check the grid chokes. In the power supply check the .82 ohm resistor
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Michael W1NR
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#77305
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L7 makes alot of smoke
Earlier this evening, while trying to tune my L7 up on 15 meters, there was a large flash and bang.? The L7 went dead and alot of smoke came out.? Opened it up and found the 47 ohm plate resistors
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K6OXN Bob
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#77304
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Re: TR5 questions
An old tech once told me that "it's almost never the alignment". If it is equally deaf on all bands you have a fault in the common parts. Follow the signal chain and see where you lose it. 73 -Jim
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Jim Shorney
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#77303
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Re: TR5 questions
The jumper made no difference. It appears this rig just is a little deaf. I am going to see if I can return it. Ed
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Ed KG5UN
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#77302
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Re: TR5 questions
Or temporarily connect a male-male RCA cable between the rear panel EXT RCVR and EXT ANT jacks.? With the RCA cable, capacitive coupling is still maintained through C702. If the receiver comes alive,
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Paul Christensen
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#77301
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Re: TR5 questions
Thanks for the info. I think I will let this mic go and try to find something better. I will dig into the manual and have a look at that jumper. 73, Ed KG5UN
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Ed KG5UN
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#77300
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Re: TR5 questions
Check that the internal RX antenna jumper has not been removed (Item C. on page 3-2 of the manual). Your 600 Ohm mic may not have enough output. The manual specifies a high impedance mic. You would
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Jim Shorney
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#77299
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Re: Drake LA-4 Amplifier
You are the winner of this thread. "Steve Wedge, W1ES/4 via groups.io" <w1es@...> wrote: -- 73 -Jim NU0C
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Jim Shorney
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#77298
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Re: T-4XB No carrier oscillator
*** That reminds me of a deal I got on a Galaxy V transceiver. It was absolutely mint condition. The flea market vendor said that he had removed the packing tape from the tubes. Lacking a power
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jerry-KF6VB
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#77297
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Re: T-4XB No carrier oscillator
Bad solder joint, open solder joint.
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Robert Logan
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#77296
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Re: Drake LA-4 Amplifier
Yeah, I guess you're right! Links always look pretty strange....... -- *73/Rick* *W4XA * * Every post is created using Linux * *
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Rick W4XA <myr748@...>
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#77295
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T-4XB No carrier oscillator
I've taken V1 half-apart and metered out components. All I've found is the 220k resistor being slightly out of tolerance. Capacitors within tolerance. C2 value is good and changes as I turn it. Pins 2
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Steve Wedge, W1ES/4
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#77294
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TR5 questions
Ok I have the rig powered up and running. not hearing much but it appears to be band conditions more than anything I hope. I did tune down below 160 to the top of the AM broadcast band and stations
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Ed KG5UN
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#77293
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Re: Drake LA-4 Amplifier
I'm going to go take a shower now... Steve Wedge, W1ES/4 Time flies like an arrow.? Fruit flies like a banana. Sent with Proton Mail secure email.
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Steve Wedge, W1ES/4
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#77292
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Re: Drake LA-4 Amplifier
THIS is a CB amplifier. See the differences? https://www.worldwidedx.com/threads/varmint-xl-1000-smoked-transformers.235711/
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Jim Shorney
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#77291
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Re: Drake LA-4 Amplifier
Ah, you looked at the link not the pictures. :D I examined the photos carefully and even saved local copies for posterity. Maybe you need new glasses? 73 -Jim NU0C "Rick W4XA via groups.io"
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Jim Shorney
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#77290
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Re: Drake LA-4 Amplifier
If I could build anything close to that level of craftsmanship, I'd be high fiving you all . :-) John K5MO [email protected]> wrote:
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John K5MO
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#77289
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