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Anyone have any dealings with this China semi-conducter manufacturer? They have MRF477 listed for like $6.98 and make some other obsolete transistors. Might be worth a shot to get one and try it out. There web site says they are ISO certified for what that is worth. The data sheet mirrors the...

I decided to send it to Mikes Electronics up in Ohio. He is a really good tech and made my 2510 sing. He warned me they are not a President 2510 but would do his best on it. I had a 5010 10 years ago and it worked really well and never had issues. I looked inside and they look pretty well made...

Is does not dim when I hook my 2510 to the same supply only the emperor dims out. I looked at the amp draw on the supply and it is low only about 3 amps. It is a 25 amp supply.

What would cause a 5010 to have the display dim on transmit. I have a 30 amp supply and my 2510 does not do this with the same supply. I was even using the same power cable for both so the cable is ok. It seems to work ok but ssb power is a little low maybe 20 watts. Must have a regulator going...

It would be easy to rewire a Ranger mic to work on the 2510. The Ranger uses a receive connection and the 2510 does not. Get a 5 pin connector and rewire leaving out the recieve wire. I was wondering if any one has done it because the 2510 mic is not the best and I have heard the Ranger mics are...

Anyone ever use a ranger 2950 mic on a hr 2510? I want a mic with the up down buttons and have 2 2510's and only one mic. Tired of switching the one mic back and forth between mobiles.

What are the chances of finding a relay for my old Royce 23 channel radio. The relay has no numbers on it just a brand, Tech. I looked on CB tricks and it just shows in the service manual the Royce part number. I was going to take it apart but it is sealed up and does not appear to come apart...

Those Sirius antenna's don't seem to be very well built from what I have heard. Fold up like a cheap card table or the matching coil goes open.

My big stick is getting old but it still does pretty good. I was looking at the ringo 10 by cushcraft. I started to buy one before the sp500 but they back ordered it. I remember now about 10 years ago I tried the Maco v58 and had similar problems. My memory is getting bad I guess and had...

Hygain super penetrator 500 for sale. It is one of the new ones they started making again. I just do not have the room for it and need to go with something smaller. I have assembled and tested it and still have the original box it came in. I did replace some of the smaller hose clamps for the...

I think I have decided to sell the sp500. I just don't have the room for it with the big radials and to much clutter around. If you are looking to get one look on the forum swap page. With the room I have I will need a 1/2 wave or something smaller.

Yes I have read that post before. I am going to replace my coax, ground the coax connector better and see what gives.

I guess I thought it would be more broad banded than it is. It does work better with the isolator and that makes me think of coax issues maybe. The coax is 10 years old and last couple of winters have been harsh not to mention the heat this year. I will probably shorten it a bit to get it...

The isolator is rated for 1500 watts pep but not recomended for am or continous duty. Of course when checking swr you have to use am or fm, I don't leave it keyed up for long. The swr's only increase about .5 with power so I am not sure if that is a problem. The isolator does help with making...

Yes more power should not change the swr reading, I do not understand what is going on but it does seem to be doing it with this antenna. The only thing that has changed is the antenna and it was pretty easy and straight forward to install. It is not very high and the radials are just a few feet...

It is after my amp (Cobra xl350) then the isolator and out to the antenna. I am thinking of making the antenna a hair shorter because at 27.605 with the amp at med. power or with out the amp the swr's are 1.0 to 1.1. I mainly work 28.3 to 28.5 and with the amp at med or high I see 1.7 to 1.8...

The isolator I am using is sold by Packet radio, a B2LISO. It seems to change the swr for the better and with it the antenna is resonant at 27.6. No meter deflection at all on the swr meter. This seems to make it below 1.6 from 11 meters up to 28.7 mhz. Not sure if this is a band aid or not. The...

I have a coax line isolator that is ferrite cores etc in a pvc like tube. I tried it at the amp output and it has lowered the swr to 1.3 or so from 27.3 to 28.490 bare foot. It still climbs some with power but less than 2 at worse case. I wonder if the radials are to long. I made them 105" like...

Well I got the sp500 up and tuned for 28.3 to 28.5. It is not very broad banded because it will not work down on 11 meters. The swr's on channel 2 are almost 3 to1 and up at channel 38 it drops some to about 2 to 1. It starts coming in about 27.6 mhz at 1.6 or so. I am kind of bummed because my...

Mainly 28.3 to 28.5. I jump down once in a while to 27 mhz on channel 38 usb.