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 Post subject: Emerson 888 Vanguard
PostPosted: May Wed 24, 2017 9:13 pm 
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Location: Mesquite NV 89027 (from Coventry, UK)
The start of a new project. The case is scratched to the extent that polishing won't fix it, most of the gold lettering is missing from the front, and the battery holder is broken, but when I connected batteries to it, it played with decent volume.
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Case and hardware small.jpg
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Attachment:
Chassis top and battery holder small.jpg
Chassis top and battery holder small.jpg [ 130.89 KiB | Viewed 3540 times ]

I know that others on the forum have overcome the issue of the battery holder, so I will do a search and see what I come up with. At least the contacts themselves are good, which is a bonus.

Colin


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 24, 2017 11:28 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
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Location: Indianapolis, IN
Hey Colin,

The chassis & speaker sure look good !

The 4-"AA" battery holder with pigtails that I used in mine fit well and believe came from Mouser. Decided not to try and resurrect the original since radio is far from "show quality"...

I do like the black sets with the gold accents...

Looking forward to report once new caps installed and "tweaking" completed.

John


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Thu 25, 2017 4:56 am 
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Location: Vincennes Indiana
Looks like all the important bits are present and working, should be a nice daily player.


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Thu 25, 2017 4:43 pm 
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Location: Mesquite NV 89027 (from Coventry, UK)
db gain wrote:
Looks like all the important bits are present and working, should be a nice daily player.

I think you are right. I was pleased when I hooked up a temporary supply and it played. That's always a good start.


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Fri 26, 2017 3:13 am 
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Location: Las Vegas Nevada 89131
One of my all time favorites.......


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Sat 27, 2017 4:58 am 
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JoelHelms wrote:
One of my all time favorites.......

Same here, I love the space / sci-fi inspired design of this radio, and they are great sounding/performing radios.


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 4:36 am 
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Location: Richmond, VA
I have replaced battery holders in a couple of those Emersons. The link below has an old thread with a photo showing the replacement holder.

I can't remember for sure, but I think I had to grind away some plastic in the old compartment to get the two sides of the radio to fit back together properly.

http://www.antiqueradios.com/forums/viewtopic.php?f=4&t=241171

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 2:04 pm 
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Ed,

I think you are right about having to grind the case. I haven't done it yet, and the case does not quite close. I tried trimming the battery holder, but that wasn't completely successful.

Colin


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 3:00 pm 
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I opened mine back up to see what I had done. Looks like I cut away the gussets at either end of the battery compartment. I used a Dremel tool with a cutting bit, I'm sure. Discouraging that I can't even remember something I did three years ago. I updated the original thread I started on my 888 in 2014 with these photos in case anyone stumbles across it looking for similar information.

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888f.jpg
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888g.jpg
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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 6:19 pm 
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Great idea, and nice work, Ed!

Now when ya get to my stage, you won't even be able to remember whatcha did 3 hours ago, let alone 3 days, bwahahaha! (what the hell am I laughing about? ).

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 6:35 pm 
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fifties wrote:
Great idea, and nice work, Ed!

Now when ya get to my stage, you won't even be able to remember whatcha did 3 hours ago, let alone 3 days, bwahahaha! (what the hell am I laughing about? ).


I think you were laughing at not being able to remember what you did 3 hours ago. Looks like it might be more like three minutes... :lol:

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 7:36 pm 
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Ed Morris wrote:
fifties wrote:
Great idea, and nice work, Ed!

Now when ya get to my stage, you won't even be able to remember whatcha did 3 hours ago, let alone 3 days, bwahahaha! (what the hell am I laughing about? ).


I think you were laughing at not being able to remember what you did 3 hours ago. Looks like it might be more like three minutes... :lol:

Say, what exactly did happen 3 minutes ago???

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“Technology is a useful servant but a dangerous master.”
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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 9:16 pm 
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Fifties forgot why he was laughing when he responded to my post. But I owe him an apology! My post was at 9:00 AM, and he replied at 12:19 PM. That's more than 3 hours. I FORGOT to check the time stamps! My bad!

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: May Wed 31, 2017 10:48 pm 
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Ummm... What were we talking about, again? :?

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 12:15 am 
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Location: Mesquite NV 89027 (from Coventry, UK)
I removed the gussets, per Ed's photo, and the battery holder almost fits. There is still a small gap between the two halves of the case, but it's as good as it's going to be. The radio plays pretty well, although when I was tweaking the IF transformers the first one didn't seem to change the amplitude of the signal. The other two were OK. I don't feel like trying to diagnose it right now, as I am happy with how it it's working.


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 2:00 am 
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Perhaps a different brand AA holder will fit better. Mine comes flush with the top f the PC board. I think I got it at Radio Shack,, which is not of much help now.

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 3:28 am 
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Colin Ames wrote:
The radio plays pretty well, although when I was tweaking the IF transformers the first one didn't seem to change the amplitude of the signal. The other two were OK.

That's not unusual. Most often, tweaking only one of the IF's will result in an audio gain, and sometimes, none of them will improve the volume.

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 1:36 pm 
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fifties wrote:
Colin Ames wrote:
The radio plays pretty well, although when I was tweaking the IF transformers the first one didn't seem to change the amplitude of the signal. The other two were OK.

That's not unusual. Most often, tweaking only one of the IF's will result in an audio gain, and sometimes, none of them will improve the volume.

Thanks, I didn't know this. I haven't aligned many radios, but every time I have done it, all IFs have affected the volume to some degree. This is the first time I have had one that didn't. I have learned something new.


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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 6:53 pm 
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Colin Ames wrote:
fifties wrote:
Colin Ames wrote:
The radio plays pretty well, although when I was tweaking the IF transformers the first one didn't seem to change the amplitude of the signal. The other two were OK.

That's not unusual. Most often, tweaking only one of the IF's will result in an audio gain, and sometimes, none of them will improve the volume.

Thanks, I didn't know this. I haven't aligned many radios, but every time I have done it, all IFs have affected the volume to some degree. This is the first time I have had one that didn't. I have learned something new.

I always do both an IF and then an RF alignment, and as often as not, the latter can improve volume more than the former. To do it, locate the trimmer screw on the antenna gang of the tuner, while tuned to a station at or near 1400 kilocycles, and adjust for loudest volume. If you have a generator, of course, that would be a superior method, but O/W a broadcast station will suffice.

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 Post subject: Re: Emerson 888 Vanguard
PostPosted: Jun Thu 01, 2017 10:49 pm 
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Richard,

I used a signal generator, and aligned IF then RF according to the instructions in Sam's. What puzzled me was that adjusting the core of the first IF, even over a large range, produced neither an increase or decrease in volume, whereas the second and third peaked as I would have expected. I have just never seen an IF that, when adjusted, did not vary the volume in some manner or other, but then I haven't done many radios. Adjusting the antenna trimmer definitely improved things. In any case, it seems to play well and I am not going to mess with it any more at this stage. Thanks for your input, it is always welcome.

Colin


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