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Thanks again TM86 Mr. Dan had the Sam's issue I was looking for and sent it to me right away you guys are great. The Sam's issue shows the MA on both meters being the same just have to check if the face plate is removable. Once again Thank You So Much. Ira

Thank You so much Dan. Exactly what I needed Thanks Ira

Thanks TM86, just went there and posted. Trying to find out if the meters in the units are the same (1 MA) other than the face plate. My rx meter stays at full scale, it ohms open, my tx meter ohms at 1k, checked everything down stream from meter, zero pot adjusts and checks good as well as the...

Good morning Dan, would you happen to have Sam's photo fact #10, looking for the information on the Browning R27/S23 series radio. Thanks Ira

Just so everyone knows I found the R-27 schematic here https://oldtuberadio.com/data/Browning Labs/Browning R-27 sch.pdf still looking for the S-23. Anybody have a copy of Sam's photo fact #10 says it has the information on this series radio. Thanks Ira

Have the schematic and the owners manual. Trouble shooting the s-meter circuit stays full scale unit on and setup (rf gain max avc on) antenna disconnected, adjust zero pot no change in meter still full scale. The voltage does drop on the top lug yellow wire from adjusting the zero pot. Should...

Update (a little late with all these storms down here) The 1973 pre driver doesn't work in this configuration. Ordered the pre driver and a set of finals got them installed she came up to 6 watts a little more investigation found an issue with the ssb alc (bad ceramic cap) replaced that and she...

OK had a few minutes to hook up the old heath kit oscillator 10-32mhz added some modulation to produce a nice wave form injected it into the so239 started from there and moved thru the coils L28 to 31 and L33,34,35,37,41,38 and L39 also checked q47,48,49 and 51 base and emitter same wave form...

Well that is music to my ears as there is no information on trouble shooting it at all. the voltage charts that are available are not specific to this chip and have contradicting pin outs and voltages between schematics! Also this chip seems to be at an end of life status and only available from...

This ones gonna be a little winded so bear with me. EPT690010C Picked this up for next to nothing previous owner said he was running a palomar 300 amp, amp went kaboom his words next day got the amp out of line fired up the radio no tx had a bad storm that night doesn't know if the amp killed it...

Thanks 399 that's the direction I was heading just wanted a little reassurance on my thoughts before i did it. I've also got some small vr's may just use 1 of them and leave it internal. (out of site out of mind) lol once again Thanks Ira

I need a little information on this mod. Can this mod be preformed without the variable pot to set the dead key at say 2 watts? Maybe a fixed resistor value to set it and forget it kinda like the cobra 29 mod. It's a locales radio and needs to be sorta tamper proof. (nicest way I can say it)...

Just to keep everyone updated I've got the receive working it was both of the 4558 ic's (ic4 and ic301) they work in tandom for the receive, squelch and pa. I was having issues with the tx frequency the 8th 10.240 crystal got me to within 4kz's, ct1 has very limited adjustment and I don't see...

Yes that's the one I've been using there are some differences but close enough for troubleshooting, voltage chart and alignment info would help a lot. Different pll and some difference in tr numbering I can't believe that there's no info on this board is it a hens tooth they only used in one...

Can't find a service manual for this unit. Is there another radio that uses the same board p-200820 or KCMK-47X only numbers I could find on the board. Trouble shooting no receive audio!! What it has tx signal and audio (5kcs low) 3 watt swings to about 18 watt. Has receive signal on meter from...

One other thing, in doing these alignments I always have an issue reading the oscillator frequency on tp6 for the ssb. So I use my hf rig and tune them by ear then get one of my buddies with a waterfall on the radio to come check my signal and fine tune it to spot on. Is there a secret to...

2517 update. It's alive!!! I had aligned the pll section, all good. Then nomads post got me thinking I had 0 watts on the meter but I could see a little signal on the monitor radio with the sniffer hooked up so clipped the sniffer on one of the coils and ran the pa section alignment all pots...

I thought about a 2sa1012 that you use for the sb817 companion since a lot of the sb754 had 1869 as the companion. Any thoughts? Does anyone have a tr/ic voltage chart for this 690011d board. As you know i got the 8 volt up and going did a partial alignment mainly pll alignment everything looks...

Update the puppet master does it again zener was bad now have 8.6 volts on the rail. You da man now I can start checking everything else out. Thank you so much man I love this site. thanks Ira