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Ham Radio Circuits and Repair / Re: RCI 2995DX NO POWER
« Last post by Crambone on Today at 07:18:39 PM »
So I pulled Q66 2SB754Y and replaced with new and still the same voltages? I tested the one Installed and the one I pulled and they tested good.
             old.       new
hfe        184       144
Ube       536mv   547mv
Ic.         6.3ma    6.4ma

I popped the collector pin off and Its showing 13Vdc but when installed it drops to 2.4Vdc Im thinking something shorted from the Collector to the TP7?
So I pulled the alignment board from TP7, 8 & 9 and tested continuity of each to ground. TP7 shows continuity but only for around 3 second then stops then shows again 3 seconds ..........! So it only does it under power if I unplug power it doesn't show continuity to ground? so plugged in switch on we have continuity as explained above. unplug with switch on no continuity, plugged in switch off no continuity. So only power and switch on will it show continuity?
Had a friend check his on the phone the same way and he doesn't receive any continuity to ground like I am seeing?
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Ham Radio Circuits and Repair / TS-520 Hi Voltage Cap Question
« Last post by KI5GKD on Today at 01:34:13 AM »
I am wondering if the Nichicon 150uf 600V units would be a good replacement for the stock 100uf 500V parts.  I've always been kind of a "more is better" person when it comes to electrolytic caps.

https://www.mouser.com/ProductDetail/Nichicon/LGN2X151MELB50?qs=sGAEpiMZZMtZ1n0r9vR22ffSD%2FE6G10k56mBcRRVcAC4pqg3IyODsQ%3D%3D
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Ham Radio Circuits and Repair / Re: RCI 2995DX NO POWER
« Last post by Crambone on November 18, 2019, 10:27:55 PM »
OH by the way I love your videos! Helped me fix my 101E without getting any help.

Thank You for sharing your valuable knowledge we appreciate it!
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Ham Radio Circuits and Repair / Re: RCI 2995DX NO POWER
« Last post by Crambone on November 18, 2019, 10:23:23 PM »
NO canít hear anything. I found Q66 only showing 13Vdc, 2.4Vdc and 13Vdc. I believe 2.4 is the collector  and should show higher voltage? I replaced it with a new Q66 (canít recall the number) but still getting the same voltages. I tried Q66 because I found TP7 only showing 2.4V
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Ham Radio Circuits and Repair / Wimpy TS-520 Cooling Fan
« Last post by KI5GKD on November 18, 2019, 10:01:53 PM »
I just got a new (to me) TS-520 on Saturday and after watching some of Buddy's videos I got it up and running.  But, is it just me or is the cooling fan about the wimpiest fan on record?  When I first got it I could watch the blades turn and after disassembling it and lubing the bearings (bushings) with Mobil 1 motor oil it runs faster but there is still virtually no airflow.  I have bought a 3.5" 120VAC muffin fan off fleabay and I hope this will run off of the 100VAC running to the stock fan.  Kind of an odd voltage to be sending to a fan IMHO.  If it doesn't run correctly I'll find a switched 120V source in the radio to send over to it.

Is this a common issue or am I over reacting?  I made a few contacts on Sunday and was told it sounded very good but as the day wore on the meter was acting screwy when I tried to touch up the tuning after changing bands.  That's when I noticed the fan poking along and I have not tried operating again after oiling the fan.
6
New member welcome / Re: Howdy from North Texas
« Last post by KI5GKD on November 18, 2019, 09:48:50 PM »
It was bought on-line with Receives OK bu no transmit.  I found when I got it that sometimes if I jiggled one of the switches the VFO light would go out so I took off the covers and went to town with the DeOxit and it was up and running in no time.  I think the receiver is better than my Yaesu FT-707.

I would probably still be working on it without your videos!
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New member welcome / Re: Howdy from North Texas
« Last post by The Radio Shop on November 18, 2019, 05:03:54 AM »
Hi Justin,
Welcome to the forums.
Great to hear you got the 520 working. Good for you.

Buddy
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New member welcome / Howdy from North Texas
« Last post by KI5GKD on November 16, 2019, 10:56:32 PM »
I would like to thank the admin for the great Ts-520 videos.  After watching them I was able to get my "new" 520SE working this morning about an hour after FedEx left it on the porch!

I originally had a Novice ticket in the late 60s and never was able to get code speed over 10 WPM so it lapsed.  Fast forward to 2019 and I passed my General test a couple months ago so I am trying to pick back up where I left off. 

Justin B.
KI5GKD
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Elmers Forum / Tram D201 non hand wired audio question
« Last post by Crambone on November 16, 2019, 09:15:04 PM »
I have a D201 that is showing low AM Receive but USB & LSB are great. The radio keys 4watts and swings 12 with great modulation. I checked all the tubes and they all show 95-100% on my Sencore VII.
I tried doing a 455 Hz AM Alignment as T400 was replaced due to a broken slug. Following procedure i fed 455Hz to pin 2 of V302 with a .01uf cap between. I good good adjustment on the L400 but none on T400 or 401 it makes zero change?
Now what?
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New member welcome / Re: Hello from Alabama
« Last post by The Radio Shop on November 08, 2019, 09:58:21 AM »
Welcome. Thanks for sharing and please keep us updated on the process.
I have been planning a video lesson on the pine board project but trying to get all the  stuff sorted out. And time.
You will love that 101 once it is done.

Buddy
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