Menu

Collins R-388 sensitivity

Search this Thread

#1

Report Post

Old

October 24th 03, 04:19 AM

Mike Knudsen

Posts: n/a

Default

Collins R-388 sensitivity

In article , (N2EY)
writes:

All true. But the info I have says the R-388/51J-3 has hi-z input.

To add some confusion to an OLD thread:
According to the schematic glued to the underside of the top cover of my R388,
the antenna does indeed go directly to the top of the antenna coil and the RF
amp grid, thru a small cap -- the Hi-Z setup.

BUT -- I have a complete Collins manual for the 51J-3, definitely not R388, and
its schematic shows the exact same thing! No link primary windings on the
antenna coils.

So it appears that BOTH the 51-J-3 and R388 were made for hi-Z antennas, and
the ER mods are relevant to either radio.

Anyway, it's neat to have a Collins that's designed to work on a short hank of
wire tacked up to the ceiling. Though it plays plenty well on my big dipole
with 52-ohm coax. 73, Mike K.

Oscar loves trash, but hates Spam! Delete him to reply to me.

Reply With Quote

Reply With Quote

#2

Report Post

Old

October 24th 03, 04:19 AM

Mike Knudsen

Posts: n/a

Default

In article , (N2EY)
writes:

All true. But the info I have says the R-388/51J-3 has hi-z input.

To add some confusion to an OLD thread:
According to the schematic glued to the underside of the top cover of my R388,
the antenna does indeed go directly to the top of the antenna coil and the RF
amp grid, thru a small cap -- the Hi-Z setup.

BUT -- I have a complete Collins manual for the 51J-3, definitely not R388, and
its schematic shows the exact same thing! No link primary windings on the
antenna coils.

So it appears that BOTH the 51-J-3 and R388 were made for hi-Z antennas, and
the ER mods are relevant to either radio.

Anyway, it's neat to have a Collins that's designed to work on a short hank of
wire tacked up to the ceiling. Though it plays plenty well on my big dipole
with 52-ohm coax. 73, Mike K.

Oscar loves trash, but hates Spam! Delete him to reply to me.

Reply With Quote

Reply With Quote

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Posting Rules
Smilies are On [IMG] code is On HTML code is Off Trackbacks are On Pingbacks are On Refbacks are On

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Scanner sensitivity and path loss?	Ralph Mowery	Antenna	0	June 24th 04 12:56 AM
FS: Collins & Bliley Accessories	Alpha_Fox_Four_Kilo	Boatanchors	0	October 5th 03 11:44 PM
Collins Collectors Association First Wednesday AM Night Oct. 1st !	Larry Saletzki	Boatanchors	2	October 1st 03 01:32 AM
Collins Collectors Association First Wednesday AM Night Oct. 1st !	Larry Saletzki	Boatanchors	0	October 1st 03 12:45 AM
FS: NIB Collins Radio Parts	LDaniel102	Boatanchors	0	August 23rd 03 06:24 PM

All times are GMT +1. The time now is 08:55 AM.

About Us

"It's about Radio"

Contact Us RadioBanter forum home Privacy Statement

Copyright © 2017