View and Download President HR owner’s manual online. 10 Meter Amateur Transceiver. HR Transceiver pdf manual download. Also for: Hr View and Download PRESIDENT HR user manual online. 10 Meter Amateur Mobile Transceiver. HR Transceiver pdf manual download. PRESIDENT LINCOLN (HR ) MODS by Roger Perales ~ perales Conversion of this text from html format to PDF by Frank Tomeš.
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Once installed you will need to adjust your AS meter for more realistic readings.
President HR2510 Owner’s Manual
The result is a pleasing, evenly lit red display that is easily visible under most lighting conditions. A sweep test of the audio chain from the collector of Q to the speaker showed an overall response of about Hz to Hz.
Rogerbird has a good mod on his web site to increase the overall gain of the audio stages, but I didn’t think this was my problem. Remove the top and bottom covers.
Reassemble the PLL board and connect power to the radio. Connect the anode of the diode to one side of the resistor. Don’t rely on a modulation meter, the only way to see what is really going on is to monitor the RF output with a scope. Solder it to pin 3 of IC Replace the covers and the screws, you should now have between 50 and watts on SSB.
Use a k ohm resistor if you use an external speaker. Rogerbird has several listed on his page.
Basically they are about the same, You need to disconnect the existing voltage from the clarifier RIT circuit and add a constant voltage to the clarifier RIT control circuit. The changes to the Mic are required because of these differences in the control operation. If your HR is Chipswitched, but doesn’t lock on 12 Meters, this mod will take care of the problem without having to access the underside of the synth PCB. The pins on IC are numbered from left to right.
I then mahual the stock lamp and suspended a pair of 12v micro-lamps from Radio Shack through two of the holes in the top. Another don’t, if you respect your fellow hams. Any value between and picofarad pf will do. Adjust VR so that squelch just breaks. The next question becomes ‘Can an HTX filter be transplanted into a for better performance? Feel free to mirror my site. That would be interesting!
It uses all the existing switches and hr25510. It is not my intention to cover ground that has already been covered by others; there are many fine resources on the web describing various mods and enhancements to these rigs.
L Connect the oscilloscpe to TP It’s a community-based project which helps to repair anything. Sun, 12 Apr Sometimes the only way to know for sure is to physically check: Connect the Brown wire, cut from J, to the White wire Orange in the Lincoln on the back of the rotary switch.
I paralleled C and C each nr2510 a high-quality computer grade. Connect the Orange wire, cut from J, to the Grey wire Brown in the Lincoln on the back of the rotary switch.
PRESIDENT HR OWNER’S MANUAL Pdf Download.
This is normal, and can be compensated for somewhat by off-tuning the signal a little with the RIT or the main dial.
Locate the 3 tuning coils on the front left corner of the main PCB. This effect will be mitigated somewhat in the HR due to the fact the the transmitter uses low-level modulation for AM and the signal is bandpass filtered by the IF crystal filter, as opposed to the classic high-level modulation that is used in older AM transmitters, but the result is still not good.
This is where I get to express my opinion of some of the other mods floating around out there.
With the radio upside down and the PLL board facing you, Remove the four screws in each corner of the pll board. This will give complete coverage from These two components are connected to the base of Q I can send the pages to you via E-mail if you wish.
To correct this, Add hr5210 4. These fixes rebias the switiching transistor to correct this. Loosen them all the way before they come completely out.
Its easy and it does not require any new switches. The right coil labeled L, adjusts CW. Pin 3 is the lead closest to the back of the radio.
There will be some interaction between the coil adjustments so you may need to repeat retuning a few times. Doc’s Radio Repair Repair and Mods gr2510 lots of interesting rigs. Take the four screws out of the speaker cover on the radio.
During this step, set the AF oscillator so that the output is less than 20V.
It does require the ability to remove the Microprocessor and solder in a new one. Remove the cover on the speaker side of the radio. DC Power supply There is a convenient ground loacted just behind Manuao What these mods do is to disconnect the 5Khz steps and allow the Mic buttons to do what the Rotary switch does.
Q is located near the front of the circuit board in the center to the left of ICabove C