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Messages - kinkydoints

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1
Electronic connection / Re: yaesu ft7250 error message on transmit
« on: February 21, 2020, 11:59:01 AM »
thanks Buddy , I kinda knew the options were limited. OK . now to set up that repair request. 

2
Electronic connection / yaesu ft7250 error message on transmit
« 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?

3
Basic beginner Electronics / Re: EICO 324- BNC for frequency counter
« on: July 09, 2019, 06:08:07 PM »
A question about this eico 324 . all worked out well with the build added a frequency counter -BNC to the unit to double check the count against the dial . On my scope the sine wave is not perfect but does do all the things it should do. OK my question, looking at a QRP kit , in the instructions are some diagrams of this unit called the pixie... for CW on 7.000MHz. on a page is a diagram showing the master oscillator circuit/ colpitts and the "power amplifier circuit"  in this circuit is what is described 
as a "pi-network output filter". for cleaning up the sine wave to the antenna on transmit...or the " key closed " this pi network filter looks fairly simple . would adding a filter to the eico 324's output have the same effect,by cleaning up it's waveform, in theory? might have more to deal with as far as multiple frequencies outputs.?? but if it were tuned for 455Khz. like most if cans ? ya im new at this .

4
Electronic connection / Re: Discussion thread for: AC 101: Rectifiers
« on: March 21, 2019, 09:37:12 AM »
Thanks guys for this site I am learning from doing more than I ever thought.  I have a question on older tube equipment that have been using these old selenium diode to power the DC side. both of the projects I am working on use these, I have seen the videos on " replacing " these with 1n4007 silicon diode and two electrolytic caps. Can a NTE5301 silicon bridge rectifier be used? that should take 2 caps out of play ?
  just like to update and clean up the underside just a little as far as the rats nest of wires .On these two s-120 hallicrafters radios found two rebuilding one,  the other for a baseline so I don't get lost, as it is untouched by me, the 324 eico . as far as the wave pattern on the 324 would the use of that solid state 5301 rectifier make it a better looking pattern ? the sine wave looks more like a camels back... 


                                                               Thanks from KN4SNM

5
Basic beginner Electronics / Re: adding fuse to tube radios
« on: March 20, 2019, 08:57:58 PM »
Thanks guys for this site I am learning from doing more than I ever thought.  I have a question on older tube equipment that have been using these old selenium diode to power the DC side. both of the projects I am working on use these, I have seen the videos on " replacing " these with 1n4007 silicon diode and two electrolytic caps. Can a NTE5301 silicon bridge rectifier be used? that should take 2 caps out of play ?
  just like to update and clean up the underside just a little as far as the rats nest of wires .On these two s-120 hallicrafters radios found two rebuilding one,  the other for a baseline so I don't get lost, as it is untouched by me, the 324 eico . as far as the wave pattern on the 324 would the use of that solid state 5301 rectifier make it a better looking pattern ? the sine wave looks more like a camels back... 


                                                               Thanks from KN4SNM

6
CB Radio Repair Forum / Re: diode
« on: February 21, 2019, 01:17:09 PM »
I have found that the parts from older things are no longer available , and might need to know the
characteristics of that part that needs replacing and find one similar to the same numbers or better. like finding old caps, get the right range of farads then voltages... 

7
CB Radio Repair Forum / Re: diode
« on: February 21, 2019, 11:44:22 AM »
https://english.electronica-pt.com/components-cross-reference?ref=1SV73

did find this site that gives a cross ref. looks like some good info , sounds like a zener ?

8
Basic beginner Electronics / EICO 324- BNC for frequency counter
« on: February 05, 2019, 08:18:08 AM »
I have made a new acquisition of a old EICO 324 , kinda had the same thing go wrong as in Buddy's video, were the resistors on that switch burnt up. this seems to be an original looking, by the paper caps and older style geranium diode.   doing some looking found old64goat's video of putting a bnc in for use with frequency counter. I kinda got the impression that the type of capacitor for this was a silver mica ..for the frequency counter output. What is the theory behind the different kinds of uses? for different types of caps? were there is a ceramic disc 1000pf cap kinda doing the same thing for the same potentiometer. is it a voltage issue, or current?

9
Basic beginner Electronics / Re: adding fuse to tube radios
« on: January 31, 2019, 01:07:50 PM »
without doing more investigating , seen a video that stated the unit runs at about 30 watts. in my study guide for my tech ticket , going sat. for exam here in KY. I noticed a  ...P-I-E ... circle , to help in calculating the different answers , were P is power in watts, E = voltage  dividing to get I = amperes .  called it 130 VAC / 30 =4.34 or so... and ya I did work out that same rated fuse. I will post some pics in the other forum to update this S120. thanks 

10
Basic beginner Electronics / adding fuse to tube radios
« on: January 28, 2019, 09:38:57 AM »
in my rebuild of a hallicrafters s120 I would like to add a slow blow fuse to the " hot" side of the main ac line in. what are the factors I need to think about in choosing the correct amp fuse? Should this fuse be the first thing the line in powers up on it's way through the unit.

11
Doing a restoration is not as easy as I thought. have run into some setbacks but am still going forward. had a broken knob on one of the rotary switch's and did some searching for a repair option. found a youtube video
that addressed the problem . cloning vintage knobs Wesley Treat's channel had this video. 

 https://www.youtube.com/watch?v=aNBHtlhlHF4       10 min. video was very cool had some things to buy but the quality of the repair and the "original " look it gives right down to the small scratches was very impressive  for the do it yourself kinda person.

12
found that the stop was not stopping the shaft from rotating all the way through . reason for two places of repair

13
well I have not tried this kind of repair before but after some fabrication and tuning , the switch works again on /off volume.  it might not be a permanent repair , but it's until I can find a replacement.

Was wondering on this s120 there is a standby /receive switch , used to keep the units tubes powered up and hot for instant on...if i used a potentiometer of the correct resistance . without a switch. I would like to use that standby switch to power on / off shouldn't be to hard to rework the wiring .


14
in my first stage of this attempt to repair a hallicrafters s120 , I found that this on/off volume switch was used to power up straight from line cord. no fuse . I decided to remove and clean contacts and wiper on the inside with some contact cleaner . upon doing this the on /off switch stopped working and let the shaft rotate too far around. then would not return to off ... no click off . opened the switch up to find that the finger inside that goes into the switch was worn bad enough to miss the slot or slip by the slot . I seen a technique to fix plastic with super glue and baking soda . ? was wondering if this just way too  much work ,and be better off trying to find a replacement  . any idea where to find a replacement with the shaft as long with internal switch . shaft looks to be 3"  to 3.25" long this is listed in the part list as a 2 meg ohm 30% 1/8 watt variable, volume control switch with internal switch. ya guess im stuck trying to fix that finger . got some small files to fine tune the repair, might take longer than i hoped to get this radio up and running.

15
Equipment Review / Re: Hallicrafters S120
« on: September 08, 2018, 06:07:17 PM »
thanks Buddy I have done a little looking at the insides of this unit as well as some reviews of other videos on youtube and found that diode...is connected to the upper bumble cap and also the first fuse resistor in my picture it is just visible under that rectangle fuse resistor upper right corner has the yellow wire to it from the line cord/volume pot, is blue with a aluminum body look but does test as a diode . and has diode markings ---|>|---  just got my cap kit , from hayseed some one has done some work in here that is not really up to standard...that brown lac line running from the AC input right to the volume control. and going to the standby/ receive  switch . more home work yet to do . Im hopeful this will work again. as of now just static . as for that 455 khz BFO circuit module , on the .jpg schematic the JL Fuhring addition looks like the upgrade for a later date.

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