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As I understand it like a good many radio's the transmit and receive design is based off of Cybernet circuit designs. Hence the strong audio and receive.
My mentor had a couple or those and the 3300 models as well. His had the 100 watt upgrade and the SP-1a and they where great. That radio was the inspiration for the RCI2950.
I just do not have any 1307's. I was wrong I am out of 2SC2312's.
I have some of those unknown maker Palomar ERF2030's if I ever decided to go the mosfet route.
I have not to date not needed to do a single mosfet conversion but the stash of parts is running low!
Maybe this will be my first...
While it is true you can design a preamp with filtering to do a stand up job it does not change the fact that just because you can not hear said station that they can hear you.
This hobby is based on talking to each other not listening to each other.
What most people really need is not a...
Look at the nonsense you see with amp's. You can show them what Toshiba, Motorola or ST Micro said about their own produce and the amount of drive they need and yet people insist on thinking they know more than the people that designed, tested and built the transistor!
Same thing goes with...
You know shit is a$$ backwards when you purchase NOS amps from the late 1970's because the entire amp is cheaper than the purchase price of the transistors in said amp!
In fact I just order 2N6487's for the 2SC1419's and tantaliums but upgraded to 35V devices and found I have all the caps I need. All Nichicon, Fuji, Panasonics and other Japanese, European caps.
What are you guys using for replacements should you need them for the 2SC1307 finals? I have a...
Like so many things in life sometimes it is better to be lucky than good!
I picked this one up pre-covid for under $140 with free shipping. I got with it a CObra CA-50 Mic which I mistakenly called a Ca-55 in the box, a Micronta 1.5A power supply, 2 of the hot swap locking brackets, the radio...
So I tried it out tonight on a make magnet mount K40 on a stock pot with a 108" radial under said stock pot. SWR was 1.2 across all 40 channels.
Wow does it have ears! I was picking up all kinds of skip. Motor Mouth Maul was giving me a solid 5-7db with swing and No Name was giving me a solid...
Let's get real! When the Cobra 148GTL started shipping from China they where a disaster. I can not imagine it was any better for the Unidens. Look at how the RCI2950 went down hill with each move from Taiwan to Malaysia and then to China! When HRO was the only game in town and they where $400+...
I was always taught that high hfe produces more power and more swing at any given input power but lower hfe equals more durability. The guy that taught me was a fantastic technician and instructor. That said I was in high school so he might have been dumbing things down for me as well!
I am...
I owned a RCI2950 1991 that had fantastic receive and transmit. I own a President Lincoln from 1998 that has fantastic Transmit and Receive. I own a Palomar SSB500 that is a receive and transmit beast. The Classic Uniden Grant XL and like boards in all other Cobra and Uniden Products fantastic...
You can see that the voltage regulator has been swapped out prob. max mod. Thermal Paste all over the place so any place you see that it has been modded. I noticed some caps replaced as well!
As to the fan running all the time that is a good thing if you use the radio and talk a lot. It is not...
Just the other day going through a box of parts I ran across 12x ERF9030 and 12x ERF2030. I should have 20X Max Mod's some place as well. Bought them when they fist came out and never did anything with them.
I am sure I will find a use for them at some point. Not selling them that is just a...
If they want it to be monkey simple toss it in a small box like any other amplifier that is not being hooked to the radio and not being wired into the radio! Include some jumpers and some high quality velcro and call it a day!
They would need to have at least 2xERF9530 better yet something like a single NXP MRF300. Anything less than that is a waste of time.
A single HG bipolar like a HG2879 or HG2290 etc....
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