{"id":4546,"date":"2024-09-01T18:10:16","date_gmt":"2024-09-01T18:10:16","guid":{"rendered":"https:\/\/solidstatestereo.com\/?page_id=4546"},"modified":"2024-09-29T17:59:44","modified_gmt":"2024-09-29T17:59:44","slug":"cr800","status":"publish","type":"page","link":"https:\/\/solidstatestereo.com\/index.php\/receivers\/cr800\/","title":{"rendered":"Yamaha CR800"},"content":{"rendered":"\t\t
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Yamaha CR800<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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$450<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Examples of interior restoration results (click on photos to expand)\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Exterior photos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Restoration notes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Beyond the list of standard restoration steps detailed on the main page<\/span><\/a>, here are some added notes for this unit<\/em> :<\/p>

I bought this on ebay based on the excellent cosmetics and discounted price due to loud popping from amplifier.\u00a0 It was well packed and arrived in fine condition.<\/p>

I have wanted to work on a CR800 ever since restoring a CR400 last year.\u00a0 The “00” series is my favorite Yamaha receiver line and the CR800 did not disappoint.\u00a0 This receiver jam-packs several boards into a fairly small volume, but the engineers added ways to slide\/pivot the chassis to gain access for easy servicing.\u00a0 The Yamaha “20” receiver series saw a shift to fewer\/large boards which has advantages (less cabling, etc), but not as fun to work on IMHO.<\/p>

As I began initial testing, I noted the loud popping issue after about 20 minutes of warm up and isolated the preamp from the amp (switch on back) to show that the issue was in the amplifier.\u00a0 I pulled and tested transistors from the amplifier board, but (as expected) all tested fine since this was an intermittent noise issue (not a constant failure).\u00a0 Leaving the output transistors alone, I worked backwards replacing\u00a0 transistors with recommended equivalents until the the popping noise was eliminated.\u00a0 Hours of listening since then continued to prove that this issue is totally resolved.<\/p>

Other functional testing went great except the AM tuner (which was totally dead).\u00a0 This turned out to be a bad AM bar antenna.\u00a0 As these are hard to find, I decided to get a working unit from my Yamaha CR600 I had yet to restore.\u00a0 AM now functions correctly.<\/p>

The lamps for the tuner pointer and meters are in great shape and shine brightly.\u00a0 Based on the very clean exterior and interior, I believe this receiver was very lightly used so decided to leave these bulbs in place.<\/p>

Recap went smoothly.\u00a0 I used Kemet PEH caps ($$) for the main amplifier supplies as they have excellent temperature, ripple, ESR and lifetime specs.<\/p>

This receiver has has an unusually high number of transistors, and I replaced 49 of them (!) that were on the AudioKarma “replace on sight” list.\u00a0 \u00a0<\/p>

The FM tuner works really well and needed little adjustment.\u00a0 It has very good sensitivity\/separation and just sounds great.<\/p>

Final functional testing complete\/passed.\u00a0\u00a0<\/p>

The cosmetics are very (very) good.\u00a0 The faceplate and cabinet are blemish-free.\u00a0 This is an exceptionally clean example.<\/p>

Something to be aware of is that the CR800 shipped with 2 different metal grills during its production run.\u00a0 Many you will see on line have a thinner grill while others have the somewhat deeper grill like this example has.\u00a0 I am guessing that Yamaha decided more ventilation was better and made this running change.\u00a0 The bottom line is that both grills are “correct”\u00a0 \u00a0If you like the thin grill, then this one is not for you \ud83d\ude42<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Bench measurements<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Yamaha specs the CR800 amplifier in 3 different conditions (all at 0.1% harmonic distortion).\u00a0\u00a0<\/p>

\u00a0 \u00a0 \u00a0 \u00a0Single channel with 8 ohm load : 55 watts\u00a0<\/p>

\u00a0 \u00a0 \u00a0 \u00a0Both channel driving 8 ohms (1000 Hz) : 50 watts per channel<\/p>

\u00a0 \u00a0 \u00a0 \u00a0Both channel driving 8 ohms (20 Hz to 20,000 Hz) : 45 watts per channel<\/p>

My results :<\/p>

\u00a0 \u00a0 \u00a0 \u00a0 Single channel with 8 ohm load : 65<\/strong> watts\u00a0<\/p>

\u00a0 \u00a0 \u00a0 \u00a0 Both channel driving 8 ohms (1000 Hz) : 60<\/strong> watts per channel<\/p>

\u00a0 \u00a0 \u00a0 \u00a0 Both channel driving 8 ohms (20 Hz to 20,000 Hz) : 55<\/strong> watts per channel<\/p>

exceeding by 10 watts\u00a0 – confirming what others have noted : the CR800 had conservative specs.\u00a0 (see Classic Receivers below)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Some reference links<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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hifiengine\u00a0 :\u00a0 https:\/\/www.hifiengine.com\/manual_library\/yamaha\/cr-800.shtml<\/a><\/p>

Classic Receivers\u00a0 :\u00a0 https:\/\/classicreceivers.com\/yamaha-cr-800<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Yamaha CR800 $450 Examples of interior restoration results (click on photos to expand) amplifier output transistors tone amplifier main caps and amplifier FM tuner bottom view top view right side left side Exterior photos Restoration notes Beyond the list of standard restoration steps detailed on the main page, here are some added notes for this […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":130,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","footnotes":""},"class_list":["post-4546","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/pages\/4546","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/comments?post=4546"}],"version-history":[{"count":44,"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/pages\/4546\/revisions"}],"predecessor-version":[{"id":4907,"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/pages\/4546\/revisions\/4907"}],"up":[{"embeddable":true,"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/pages\/130"}],"wp:attachment":[{"href":"https:\/\/solidstatestereo.com\/index.php\/wp-json\/wp\/v2\/media?parent=4546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}